http://usgeologymorphology.com/index.html 2016-11-30 Monthly http://usgeologymorphology.com/bruneau-canyon-idaho-banner.jpg Bruneau canyon, Idaho Idaho, USA http://usgeologymorphology.com/morton-gneiss-11-200px.jpg Morton gneiss Morton, Minnesota Morton Gneiss, in the Minnesota River Valley, is an Archean rock: light-gray tonalite and dark-gray amphibolite inclusions http://usgeologymorphology.com/morton-gneiss-11.JPG Morton gneiss Morton, Minnesota, USA Morton Gneiss, in the Minnesota River Valley, is an Archean rock: light-gray tonalite and dark-gray amphibolite inclusions http://usgeologymorphology.com/NC-inner-piedmont-on-topo-map-200px.jpg North Carolina Inner Piedmont tectonic and topographic map North Carolina, USA http://usgeologymorphology.com/NC-inner-piedmont-on-geologic-map-200px.jpg North Carolina Inner Piedmont tectonic and geologic map North Carolina, USA http://usgeologymorphology.com/NC-inner-piedmont-on-NED-map-200px.jpg North Carolina Inner Piedmont tectonic and NED map North Carolina, USA http://usgeologymorphology.com/NC-geologic-map-NCGS-1985-thumb.jpg North Carolina geologic map North Carolina, USA http://usgeologymorphology.com/clarendon-co-sc-soil-map-200px.jpg Clarendon County, South Carolina soil map South Carolina, USA http://usgeologymorphology.com/clarendon-co-geomorphologic-map-200px.jpg Clarendon County, South Carolina geomorphologic map South Carolina, USA http://usgeologymorphology.com/bruneau-canyon-idaho-N-map-200px.jpg map of the Bruneau River canyon area, Idaho elevation map of bruneau canyon in the bruneau river basin Idaho, USA http://usgeologymorphology.com/bruneau-canyon-idaho-200px.jpg photo of Bruneau canyon, Idaho Idaho, USA http://usgeologymorphology.com/biotite-crystals-thumb.jpg Biotite crystals http://usgeologymorphology.com/2096-43-27-30-N-200px.jpg Great unconformity in Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2063-43-32-29-N-200px.jpg photo of Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/rock-springs-uplift-small.jpg Rock Springs uplift, Wyoming Wyoming, USA http://usgeologymorphology.com/1437-lombard-thrust-missouri-river-canyon-200px.jpg Lombard thrust and Missouri River Canyon near Toston Montana, USA http://usgeologymorphology.com/hossfeldt-anticl-eustis-cross-section-200px.jpg Cross-section of Hossfeldt anticline and Eustis syncline near Lombard thrust Montana, USA http://usgeologymorphology.com/2420-popple-hill-gneiss-200px.jpg Popple Hill gneiss in Adirondack Mountains Adirondack Mountains, New York, USA http://usgeologymorphology.com/about.html 2016-11-30 Monthly http://usgeologymorphology.com/Patrick-Mangou.jpg Patrick Mangou http://usgeologymorphology.com/field trip 402-group-800px.jpg 2011 GSA field trip Superior province, Minnesota and Ontario Soudan, Minnesota http://usgeologymorphology.com/gsa-field-trip-403-group-2a-800px.jpg 2012 GSA field trip Inner Piedmont of North Carolina Boomer, North Carolina http://usgeologymorphology.com/2014-GSA-Field-Trip-Group-Yellowstone.jpg 2014 GSA field trip Yellowstone River valley and Yellowstone National park Montana, Wyoming, USA http://usgeologymorphology.com/2015-Rock-Springs-White-Mountain-WY.jpg 2015 field trip in Rock Springs uplift, Wyoming Wyoming, USA http://usgeologymorphology.com/GSA-field-trip-404-2013-group-800px.jpg 2013 GSA field trip Laramie Mountains, Wyoming Wyoming, USA http://usgeologymorphology.com/MN-archean-p1.html 2013-02-07 Monthly http://usgeologymorphology.com/minnesota-elevation-map-v4.jpg Minnesota elevation map http://usgeologymorphology.com/minnesota-3D-elevation-map.jpg Minnesota elevation map in 3D http://usgeologymorphology.com/minnesota-depth-to-bedrock.jpg Minnesota depth to bedrock map depth of bedrock in Minnesota http://usgeologymorphology.com/MN-archean-p2.html 2012-06-25 Monthly http://usgeologymorphology.com/minnesota-archean-terranes-v2-8-1000px.jpg map of minnesota archean terranes map of minnesota archean provinces http://usgeologymorphology.com/minnesota-archean-terranes-v2-8-2128px.jpg map of minnesota archean terranes high-resolution map of minnesota archean provinces http://usgeologymorphology.com/minnesota-archean-terranes-v2-8-2128px.pdf 2012-06-25 Monthly http://usgeologymorphology.com/MN-archean-p3.html 2012-07-26 Monthly http://usgeologymorphology.com/minnesota-river-valley-aeromagnetic-map-v3.2.jpg map of the Minnesota River Valley province with Archean blocks Shaded-relief aeromagnetic anomaly map of the Minnesota River Valley subprovince showing its four belts: Benson, Montevideo, Morton and Jeffers blocks Southwestern Minnesota http://usgeologymorphology.com/minnesota-river-valley-archean-blocks-map.jpg Map of the Minnesota River Valley Terrane Archean blocks and lineaments of the Minnesota River Valley subprovince shown on the shaded-relief map Southwestern Minnesota http://usgeologymorphology.com/MN-archean-p4.html 2012-07-31 monthly http://usgeologymorphology.com/montevideo-gneiss.jpg pink Montevideo gneiss near Montevideo, MN typical pink Archean Montevideo gneiss Minnesota River Valley http://usgeologymorphology.com/mafic-gneiss-granite-falls.jpg mafic gneiss near Granite Falls, MN Archean mafic gneiss intruded by pink pegmatite veins Minnesota River Valley http://usgeologymorphology.com/montevideo-gneiss-4A.jpg green folded Montevideo gneiss near Granite Falls, MN Montevideo granite gneiss near Granite Falls showing two generations of folds; this sample contains hypersthene, hence the green color Minnesota River Valley http://usgeologymorphology.com/montevideo-gneiss-4E.jpg folded Montevideo gneiss near Montevideo, MN Montevideo gneiss near Montevideo: pink granitic veins intrude foliated gray granodiorite and are folded Minnesota River Valley http://usgeologymorphology.com/MN-archean-p5.html 2012-07-27 weekly http://usgeologymorphology.com/morton-gneiss-09-600px.jpg Morton tonalite gneiss Morton gneiss. Light-gray tonalite gneiss and dark-gray amphibolite are folded Minnesota River Valley http://usgeologymorphology.com/morton-gneiss-15-600px.jpg Morton tonalite and granite gneiss Morton gneiss. Light-gray tonalite gneiss layers and pink granite gneiss layers Minnesota River Valley http://usgeologymorphology.com/morton-gneiss-thin-section-01-x40-PPL-small.jpg Morton tonalite gneiss thin section - plane polarized light Morton gneiss thin section: tonalite (quartz, plagioclase) between inclusions of amphibolite (hornblende) Minnesota River Valley http://usgeologymorphology.com/morton-gneiss-thin-section-01-x40-XPL-small.jpg Morton tonalite gneiss thin section - crossed polarized light Morton gneiss thin section: tonalite (quartz, plagioclase) between inclusions of amphibolite (hornblende) Minnesota River Valley http://usgeologymorphology.com/sacred-heart-granite.JPG Sacred Heart Granite, Minnesota Sacred Heart Granite, Morton block, Minnesota River Valley Terrane Southwestern Minnesota http://usgeologymorphology.com/MN-archean-p6.html 2016-07-27 weekly http://usgeologymorphology.com/morton-gneiss-sample.jpg Hand sample of Morton gneiss showing the dark-gray amphibolite and the off-white tonalite gneiss Minnesota River Valley http://usgeologymorphology.com/morton-gneiss-close-up-600px.jpg close-up of Morton gneiss hand sample Minnesota River Valley http://usgeologymorphology.com/quartz-undulose-extinction-in-morton-gneiss.jpg example of undulose extinction of quartz in Morton tonalite gneiss, due to deformation; XPL thin section http://usgeologymorphology.com/quartz-undulose-extinction-A-400px.jpg XPL thin section of quartz undulose extinction http://usgeologymorphology.com/quartz-undulose-extinction-B-400px.jpg XPL thin section of quartz undulose extinction http://usgeologymorphology.com/quartz-undulose-extinction-C-400px.jpg XPL thin section of quartz undulose extinction http://usgeologymorphology.com/morton-gneiss-thin-section-03-PPL-400px.jpg PPL thin section of Morton gneiss http://usgeologymorphology.com/morton-gneiss-thin-section-03-XPL-400px.jpg XPL thin section of Morton gneiss http://usgeologymorphology.com/morton-gneiss-thin-section-02-PPL-400px.jpg PPL thin section of Morton tonalite gneiss http://usgeologymorphology.com/morton-gneiss-thin-section-02-XPL-400px.jpg XPL thin section of Morton tonalite gneiss http://usgeologymorphology.com/morton-gneiss-becke-line.jpg Use of the Becke Line method to determine the composition of plagioclase feldspar in the Morton tonalite gneiss http://usgeologymorphology.com/MN-archean-p-ref.html 2012-06-30 Monthly http://usgeologymorphology.com/NC-p1.html 2012-11-26 Monthly http://usgeologymorphology.com/NC-geologic map-NCGS-1985-900px.jpg North Carolina geologic map North Carolina, USA http://usgeologymorphology.com/NC-inner-piedmont-on-geologic-map.jpg North Carolina Inner Piedmont tectonic and geologic map NC Inner Piedmont faults and thrust sheets North Carolina, USA http://usgeologymorphology.com/NC-inner-piedmont-on-topo-map.jpg North Carolina Inner Piedmont tectonic and topographic map NC Inner Piedmont faults and thrust sheets North Carolina, USA http://usgeologymorphology.com/NC-inner-piedmont-on-NED-map.jpg North Carolina Inner Piedmont tectonic and NED map NC Inner Piedmont faults and thrust sheets North Carolina, USA http://usgeologymorphology.com/NC-geologic-map-NCGS-1985.pdf 2012-11-26 Monthly http://usgeologymorphology.com/NC-inner-piedmont-on-topo-map.pdf 2012-10-18 Monthly http://usgeologymorphology.com/NC-inner-piedmont-on-topo-map-2000px.pdf 2012-10-20 Monthly http://usgeologymorphology.com/NC-inner-piedmont-on-geologic-map.pdf 2012-10-18 Monthly http://usgeologymorphology.com/NC-inner-piedmont-on-geologic-map-2000px.pdf 2012-10-20 Monthly http://usgeologymorphology.com/NC-inner-piedmont-on-NED-map.pdf 2012-10-18 Monthly http://usgeologymorphology.com/NC-inner-piedmont-on-NED-map-2000px.pdf 2012-10-20 Monthly http://usgeologymorphology.com/clarendon-co-title.html 2012-12-13 weekly http://usgeologymorphology.com/SC-physiographic-map-200px.jpg South Carolina map of major geologic regions-thumbnail South Carolina http://usgeologymorphology.com/clarendon-co-geomorphologic-map-200px.jpg Clarendon County, SC map of major geologic regions-thumbnail Clarendon County, South Carolina http://usgeologymorphology.com/clarendon-co-geomorpho.html 2012-12-12 weekly http://usgeologymorphology.com/SC-physiographic-map.jpg South Carolina map of major geologic regions South Carolina http://usgeologymorphology.com/clarendon-co-geomorphologic-map.jpg Clarendon County, SC map of major geologic regions the geomorphology of clarendon county provides a good example of the middle and lower atlantic coastal plain Clarendon County, South Carolina http://usgeologymorphology.com/clarendon-co-geomorphologic-map-large.pdf 2012-12-12 Monthly http://usgeologymorphology.com/clarendon-co-soils.html 2013-01-23 monthly http://usgeologymorphology.com/clarendon-co-sc-soil-map.jpg map of the soil units of clarendon county the soil map clarendon county is a good example of the lower and middle atlantic coastal plain soils Clarendon County, South Carolina http://usgeologymorphology.com/clarendon-co-sc-soil-map.pdf 2013-01-23 monthly http://usgeologymorphology.com/bruneau-p1.html 2016-12-01 weekly http://usgeologymorphology.com/bruneau-canyon-idaho-map.jpg elevation map of bruneau river basin Idaho, USA http://usgeologymorphology.com/blackrock-escarpment-idaho-700px.jpg Black Rock Escarpment, Bruneau Canyon, Idaho Idaho, USA http://usgeologymorphology.com/blackrock-escarpment-idaho-google-earth.jpg Black Rock Escarpment Google Earth view, Bruneau Canyon, Idaho Idaho, USA http://usgeologymorphology.com/bruneau-river-valley-at-42-deg-12-min-N.jpg 3D image of Bruneau River valley north of the Nevada border at 42 deg 12' Idaho, USA http://usgeologymorphology.com/bruneau-canyon-at-42-deg-24-min-N.jpg 3D image of Bruneau River canyon south end at 42 deg 24' Idaho, USA http://usgeologymorphology.com/bruneau-p2.html 2013-01-22 weekly http://usgeologymorphology.com/bruneau-canyon-idaho-map-north.jpg elevation map of northern bruneau river basin Idaho, USA http://usgeologymorphology.com/bruneau-canyon-at-42-deg-41-min-N.jpg 3D image of bruneau canyon at scenic overlook Idaho, USA http://usgeologymorphology.com/bruneau-canyon-idaho.jpg photo of bruneau canyon from scenic overlook Idaho, USA http://usgeologymorphology.com/bruneau-canyon-at-42-deg-45-min-N.jpg 3D image of northern end of bruneau canyon Idaho, USA http://usgeologymorphology.com/bruneau-canyon-geologic-map.jpg geologic map of the northern part of bruneau canyon Idaho, USA http://usgeologymorphology.com/biotite.html 2016-01-22 monthly http://usgeologymorphology.com/biotite-crystals.jpg photo of biotite crystals http://usgeologymorphology.com/biotite-atoms-actual-size.jpg Atomic structure a biotite sample: atoms at actual size http://usgeologymorphology.com/biotite-unit-cell.jpg Crystal structure of a biotite unit cell http://usgeologymorphology.com/biotite-atomic-structure.jpg Atomic structure of a phlogopite (biotite) sample containing fluorine http://usgeologymorphology.com/morton-gneiss-thin-section-01-PPL-400px.jpg PPL thin section of biotite in Morton gneiss, Minnesota River Valley Minnesota River valley, Minnesota, USA http://usgeologymorphology.com/morton-gneiss-thin-section-01-XPL-400px.jpg XPL thin section of biotite in Morton gneiss, Minnesota River Valley Minnesota River valley, Minnesota, USA http://usgeologymorphology.com/hornblende.html 2016-01-22 monthly http://usgeologymorphology.com/hornblende-crystals-in-andesite.jpg Hornblende crystals in an andesite http://usgeologymorphology.com/hornblende-hand-sample-closeup.jpg Close-up of a hornblende crystal, cut orthogonally to its long axis http://usgeologymorphology.com/hornblende-crystals.jpg Hornblende crystals. Typical greenish color http://usgeologymorphology.com/hornblende-in-andesite-thin-section-ppl.jpg PPL thin section of hornblende http://usgeologymorphology.com/hornblende-in-andesite-thin-section-xpl.jpg XPL thin section of hornblende http://usgeologymorphology.com/wind-river-canyon-p1.html 2016-11-01 monthly http://usgeologymorphology.com/wind-river-canyon-location-map.jpg Location map of Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-location-map-large-scale.jpg Large-scale location map of Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-3D-800px.jpg 3-D view of Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-stratigraphic-column.jpg Stratigraphic column of rocks in Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-aerial-view-with-strata-800px.jpg Aerial view looking north of Wind River canyon, Wyoming with stratigraphy Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-p2.html 2016-11-01 monthly http://usgeologymorphology.com/2049-wind-river-43-35-56-N-800px.jpg photo of the northern entrance of Wind River canyon with strata, Wyoming Wyoming, USA http://usgeologymorphology.com/2051-wind-river-43-34-58-N-800px.jpg Park City formation in Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2053-wind-river-43-33-54-N-SV-800px.jpg Tensleep sandstone above the Sandy dolomite member of Amsden formation in Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2053-wind-river-43-33-54-N-H500px.jpg close-up of Tensleep sandstone above the Sandy dolomite member of Amsden formation in Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2057-wind-river-43-33-37-N-800px.jpg Tensleep sandstone and Amsden formation in Wind River canyon with rock layers, Wyoming Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-p3.html 2016-11-01 monthly http://usgeologymorphology.com/2060-wind-river-43-33-37-N-800px.jpg Contact between Amsden formation and Madison limestone in Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2061-wind-river-43-33-01-N-800px.jpg East side of Wind River canyon at 43 deg 33' 37" N, Wyoming Wyoming, USA http://usgeologymorphology.com/wind-river-43-32-45-N-SV-800px.jpg Northern end of exposure of Devonian and Ordovician rocks in Wind River canyon, Wyoming. Darby formation, Madison limestone, Bighorn dolomite Wyoming, USA http://usgeologymorphology.com/2066-wind-river-43-32-15-N-H500px.jpg East side of Wind River canyon at 43 deg 32' 15" N in Wind River canyon, Wyoming. Madison limestone and Bighorn dolomite Wyoming, USA http://usgeologymorphology.com/2063-wind-river-43-32-29-N-800px.jpg General view of the Wind River canyon at 43 deg 32' 29" N, Wyoming Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-p4.html 2016-11-01 monthly http://usgeologymorphology.com/2067-wind-river-43-32-01-N-H500px.jpg Northern end of the Gallatin limestone outcrop in Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2068-wind-river-43-30-26-N-800px.jpg View to the north of Wind River canyon at 43 degrees 30' 26" N, Wyoming. Bighorn dolomite and Gallatin limestone Wyoming, USA http://usgeologymorphology.com/2071-wind-river-43-28-46-N-800px.jpg View to the northwest of the western side of Wind River canyon at 43 deg 28' 46" N, Wyoming. Gallatin limestone and Gros Ventre formation Wyoming, USA http://usgeologymorphology.com/2074-wind-river-48-28-21-N-800px.jpg Northernmost exposure of Cambrian Flathead sandstone in Wind River canyon, Wyoming. Wyoming, USA http://usgeologymorphology.com/2077-wind-river-43-28-04-N-800px.jpg Flathead sandstone at 43deg 28' 04" N in Wind River canyon Wyoming, USA http://usgeologymorphology.com/wind-river-canyon-p5.html 2016-11-01 monthly http://usgeologymorphology.com/2079-wind-river-43-27-54-N-800px.jpg Northern end of the Great Unconformity, Wind River canyon, Wyoming. Flathead sandstone, Archean granite Wyoming, USA http://usgeologymorphology.com/2096-wind-river-43-27-30-N-800px.jpg Great unconformity at 43 deg 27' 30" N in Wind River canyon, Wyoming. Archean quartz-monzonite, granite, and amphibolite Wyoming, USA http://usgeologymorphology.com/2096-wind-river-43-27-30-N-large.jpg High-resolution photo of the Great unconformity at 43 deg 27' 30" N in Wind River canyon, Wyoming. Archean quartz-monzonite, granite, and amphibolite Wyoming,USA http://usgeologymorphology.com/2094-wind-river-43-27-30-N-800px.jpg Fine-grained plagioclase-hornblende amphibolite at 43 deg 27' 30" N on eastern side of Wind River canyon, Wyoming. Wyoming, USA http://usgeologymorphology.com/2092-wind-river-43-27-30-N-800px.jpg Blocky amphibolite at 43 deg 27' 30" N on eastern side of Wind River canyon, Wyoming. Wyoming, USA http://usgeologymorphology.com/2095-wind-river-43-27-30-N-800px.jpg Pegmatite dike in amphibolite at 43 deg 27' 30" N on eastern side of Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2087-wind-river-boysen-fault-43-26-35-N-800px.jpg Boysen fault at south end of Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/2085-wind-river-S-of-boysen-fault-43-26-35-N-800px.jpg Hanging wall of Boysen fault at south end of Wind River canyon, Wyoming Wyoming, USA http://usgeologymorphology.com/RKS-uplift-p1.html 2016-10-01 monthly http://usgeologymorphology.com/greater-green-river-basin-map-600px-names.jpg Geologic map of the Greater Green River basin, Wyoming Wyoming, USA http://usgeologymorphology.com/green-river-basin-cross-section-1000px.jpg Cross-section of the Green River basin, Wyoming Wyoming, USA http://usgeologymorphology.com/Green-River-basin-W-of-Opal-600px.jpg photo of the Green River basin west of Opal, Wyoming Wyoming, USA http://usgeologymorphology.com/Green-River-Basin-NE-of-Opal-600px.jpg photo of the Green River basin northeast of Opal, Wyoming Wyoming, USA http://usgeologymorphology.com/Tollgate-Rock-Palisades-600px.jpg The Palisades and Tollgate Rock, northwest of Green River, Wyoming Wyoming, USA http://usgeologymorphology.com/Green-River-Palisades-600px.jpg The Palisades, northwest of Green River, Wyoming Wyoming, USA http://usgeologymorphology.com/RKS-uplift-p2.html 2016-10-01 monthly http://usgeologymorphology.com/2162-white-mountain-top.jpg Top of White Mountain, Wyoming: Sand Butte Bed sandstone of the Laney member and Wilkins Peak member of the Green River formation Wyoming,USA http://usgeologymorphology.com/2167-white-mountain-Tgl-Tgw-contact.jpg White Mountain, Wyoming: Sand Butte Bed sandstone of the Laney member and Wilkins Peak member of the Green River formation Wyoming,USA http://usgeologymorphology.com/2165-Tgl-closeup.jpg Close-up of the Sand Butte Bed sandstone (Laney member of the Green River formation), White Mountain,Wyoming Wyoming,USA http://usgeologymorphology.com/2158-Tgw-closeup.jpg Close-up of the Wilkins Peak member (Tgw) of the Green River formation, White Mountain,Wyoming Wyoming,USA http://usgeologymorphology.com/2163-white-mountain-Tgt-terrace.jpg White Mountain, Wyoming: Wilkins Peak layer and terrace in the Tipton Shale layer Wyoming,USA http://usgeologymorphology.com/2154-white-mountain-top-of-Tgt.jpg White Mountain, Wyoming: Top of the Tipton Shale member of the Green River formation Wyoming,USA http://usgeologymorphology.com/2172-Twm-wasatch-formation.jpg White Mountain, Wyoming: Close-up of the lower (main) member of the Wasatch formation Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p3.html 2016-10-01 monthly http://usgeologymorphology.com/leucite-hills-map-small-H550px.jpg Map of the Leucite Hills volcanic features, Wyoming Wyoming,USA http://usgeologymorphology.com/leucite-hills-map-large-H921px.jpg High-resolution map of the Leucite Hills volcanic features, Wyoming Wyoming,USA http://usgeologymorphology.com/2018-S-Table-Mtn.jpg South Table Mountain, Leucite Hills, Wyoming Wyoming,USA http://usgeologymorphology.com/2009-Black-Rock.jpg Black Rock, Leucite Hills, Wyoming Wyoming,USA http://usgeologymorphology.com/1988-Leucite-Hills-Zirkel-Mesa.jpg Zirkel Mesa, Leucite Hills, Wyoming Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p3a.html 2016-10-01 monthly http://usgeologymorphology.com/2257-orendite-600px.jpg Hand sample of orendite (Zirkel Mesa, Leucite Hills, Wyoming Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-22-40x-PPL-600px.jpg PPL thin section of a wyomingite Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-49-100x-PPL-600px.jpg Phlogopite phenocrysts in a PPL thin section of a wyomingite Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-1-PPL-400x-600px.jpg Leucite and magnophorite (PPL thin section) in a wyomingite Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-46-400x-PPL-400px.jpg Leucite and magnophorite (PPL thin section) in a wyomingite Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-46-400x-XPL-400px.jpg Leucite and magnophorite (XPL thin section) in a wyomingite Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-47-400x-PPL-600px.jpg Diopside laths in wyomingite (PPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-5-a-40x-PPL-600px.jpg General view of a spherulite in wyomingite (PPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-5-100x-XPL-1-600px.jpg Close-up of a spherulite in wyomingite (XPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-5-a-100x-PPL-H500px.jpg detail of a spherulite in wyomingite (PPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-5-600x-PPL-H500px.jpg detail of a spherulite in wyomingite (PPL thin section at 600x magnification) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-13-400x-PPL-1-400px.jpg spherulite in wyomingite (PPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-13-400x-XPL-1-400px.jpg spherulite in wyomingite (XPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-12-100x-XPL-400px.jpg Devitrified glass in an amygdule in wyomingite (XPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LHG-12-400x-XPL-400px.jpg Devitrified glass in an amygdule in wyomingite (XPL thin section - 400x magnification) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p3b.html 2016-10-01 monthly http://usgeologymorphology.com/LH2-5-100x-PPL-600px.jpg Thin section of an orendite (PPL) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH2-5-100x-XPL-600px.jpg Thin section of an orendite (XPL) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH2-15-100x-XPL-000d-600px.jpg close-upof a thin section of an orendite (XPL) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH2-14-400x-XPL-600px.jpg Close-up of a sanidine groundmass plate (XPL thin section) in an orendite with priderite and diopside Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH2-16-600x-PPL-600px.jpg Leucite and magnophorite in the groundmass of an orendite (PPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH2-2-40x-XPL-1-600px.jpg Olivine phenocryst in an olivine orendite (XPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH1-16-100x-PPL-400px.jpg Olivine phenocryst, partially resorbed, in an olivine orendite (PPL thin section) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH1-16-400x-PPL-400px.jpg Olivine phenocryst, partially resorbed, in an olivine orendite (PPL thin section, 400x magnification) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH1-8-100x-PPL-400px.jpg Thin section of richterite in orendite with richterite (PPL) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/LH1-8-100x-XPL-400px.jpg Thin section of richterite in orendite with richterite (XPL) Leucite Hills, Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p4.html 2016-10-01 monthly http://usgeologymorphology.com/killpecker-sand-dunes-GE-aerial-H400px.jpg aerial view of the Killpecker sand dune field, Wyoming Wyoming,USA http://usgeologymorphology.com/killpecker-sand-dunes-GE-3D-800px.jpg 3-D view of the Killpecker sand dune field, Wyoming Wyoming,USA http://usgeologymorphology.com/2024-Killpecker-Dunes.jpg photo of the Killpecker sand dune field Wyoming,USA http://usgeologymorphology.com/2030-Killpecker-sand-dunes-Boars-tusks.jpg photo of the Killpecker sand dune field and Boars Tusk volcanic neck Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p5.html 2016-10-01 monthly http://usgeologymorphology.com/rock-springs-uplift-geol-map-H550px.jpg Geologic map of Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/rock-springs-uplift-geol-map-H941px.jpg high-resolution geologic map of Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/rock-springs-uplift-W-Ctr-cross-section.jpg Cross-section of the western half of Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/rock-springs-uplift-east-cross-section.jpg Cross-section of the eastern edge of Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2180-aspen-mountain.jpg Aspen Mountain, Quaking Asp Mountain, Wyoming Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p6.html 2016-10-01 monthly http://usgeologymorphology.com/2183-baxter-shale-baxter-basin-600px.jpg Baxter shale in Baxter basin, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2184-baxter-basin-gully-600px.jpg South Baxter basin strata, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2143-erosion-in-baxter-shale-600px.jpg Gullied Baxter Shale in Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2137-N-baxter-basin-600px.jpg Rock Springs formation and Blair formation in North Baxter basin, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2177-baxter-basin-Krs-Kbl-contact-600px.jpg Contact between the Blair and Rock Springs formations in the South Baxter basin, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p7.html 2016-10-01 monthly http://usgeologymorphology.com/1976-rock-springs-formation-near-winton-600px.jpg Rock Springs formation near Winton, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2131-rock-springs-formation-near-east-plane-600px.jpg Rock Springs formation near East Plane, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2143-erosion-in-baxter-shale-600px.jpg Gullied Baxter Shale in Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2176-rock-springs-formation-in-south-rock-springs-600px.jpg Rock Springs formation in the south of Rock Springs, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/1978-rock-springs-formation-above-blair-formation-600px.jpg Rock Springs formation above Blair formation, eastern Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/1983-rock-springs-formation-sandstone-600px.jpg Rock Springs formation sandstone, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2199-rock-springs-formation-near-thayer-junction-600px.jpg Rock Springs formation near Thayer Junction, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2205-rock-springs-ericson-formations-contact-600px.jpg Contact between Rock Springs formation and Ericson sandstone west of Point of Rocks, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2208-rock-springs-ericson-formations-contact-600px.jpg close-up of contact between Rock Springs formation and Ericson sandstone west of Point of Rocks, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p8.html 2016-10-01 monthly http://usgeologymorphology.com/2122-ericson-sandstone-in-rock-springs-600px.jpg Ericson sandstone in Rock Springs, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2129-ericson-sandstone-north-of-rock-springs-600px.jpg Weathered Ericson sandstone, north of Rock Springs, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/1984-ericson-sandstone-on-rock-springs-formation-with-coal-600px.jpg Ericson sandstone overlying coal-bearing Rock Springs formation in Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2125-almond-formation-north-of-rock-springs-600px.jpg Almond formation north of Rock Springs, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2188-almond-formation-on-ericson-sandstone-600px.jpg Almond formation overlying Ericson sandstone, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p9.html 2016-11-01 monthly http://usgeologymorphology.com/2191-lewis-shale-fox-hills-sandst-lance-frm-600px.jpg Lewis shale, Fox Hills sandstone and Lance formation, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2194-lance-formation-600px.jpg Lance formation, Rock Springs Uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2197-fort-union-formation-600px.jpg Fort Union formation in the eastern half of Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2195-clinker-in-fort-union-formation-600px.jpg Clinker in Fort Union formation, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/2266-clinker-sample-600px.jpg close-up of clinker in Fort Union formation, Rock Springs uplift, Wyoming Wyoming,USA http://usgeologymorphology.com/RKS-uplift-p-ref.html 2016-10-01 Monthly http://usgeologymorphology.com/Lombard-thrust-p1.html 2016-10-01 monthly http://usgeologymorphology.com/lombard-thrust-map-H1400px.jpg High-resolution location map of Lombard thrust and Toston fault, southwestern Montana Montana,USA http://usgeologymorphology.com/lombard-thrust-map-H700px.jpg Location map of Lombard thrust and Toston fault, southwestern Montana Montana,USA http://usgeologymorphology.com/toston-area-map-600px.jpg Geologic map of Lombard thrust in Toston area Montana,USA http://usgeologymorphology.com/1415-lombard-thrust-SE-of-toston-E-bank-600px.jpg Lombard thrust seen from the northwest near Toston Montana,USA http://usgeologymorphology.com/1418-reverse-fault-SE-of-toston-W-bank-layers-600px.jpg A reverse fault or secondary thrust east of the Lombard thrust on the west bank of the Missouri River near Toston Montana,USA http://usgeologymorphology.com/1423-toston-canyon-E-bank-600px.jpg East bank of the Missouri River canyon south of the Lombard thrust near Toston Montana,USA http://usgeologymorphology.com/1422-toston-canyon-E-bank-close-up-600px.jpg Close-up of the Quadrant and Phosphoria formations on the east bank of the Missouri River canyon near Toston Montana,USA http://usgeologymorphology.com/1422-toston-canyon-E-bank-close-up-4272px.jpg Close-up of the Quadrant and Phosphoria formations on the east bank of the Missouri River canyon near Toston (high-resolution photo) Montana,USA http://usgeologymorphology.com/1437-lombard-thrust-missouri-river-canyon-600px.jpg General view of the Lombard thrust in the Toston area Montana,USA http://usgeologymorphology.com/Lombard-thrust-p2.html 2016-11-30 monthly http://usgeologymorphology.com/milligan-canyon-area-geol-map-H500px.jpg Geologic map of the Lombard thrust, in the Milligan Canyon area, west of Three Forks, Montana Montana,USA http://usgeologymorphology.com/1400-1-2-mosaic-1000px.jpg Panoramic view of the Lombard thrust in the Milligan Canyon area, southwestern Montana Montana,USA http://usgeologymorphology.com/1400-1-2-mosaic-4000px.jpg High-resolution panoramic view of the Lombard thrust in the Milligan Canyon area, southwestern Montana Montana,USA http://usgeologymorphology.com/1401-three-forks-area-600px.jpg Close-up of the central part of the mosaic of fig. 2-2 (Lombard thrust, Milligan Canyon area, Montana) Montana,USA http://usgeologymorphology.com/lombard-thrust-west-of-three-forks-3D-view-800px.jpg 3-D view from the south of the Lombard thrust, in the Milligan Canyon area, southwest of Three Forks, Montana Montana,USA http://usgeologymorphology.com/lombard-thrust-south-west-of-three-forks-600px.jpg Western branch of the Lombard thrust in the Milligan Canyon area, southwest of Three Forks, Montana Montana,USA http://usgeologymorphology.com/Lombard-thrust-p3.html 2016-11-30 monthly http://usgeologymorphology.com/1408-hossfeldt-hills-lombard-thrust-600px.jpg Hossfeldt Hills, Montana Montana,USA http://usgeologymorphology.com/hossfeldt-eustis-3D-image-800px.jpg 3-D view of the Hossfeldt Hills, southwestern Montana Montana,USA http://usgeologymorphology.com/hossfeldt-hills-lombard-thrust-geol-map-600px.jpg Geologic map of the southern part of the Hossfeldt Hills, southwestern Montana Montana,USA http://usgeologymorphology.com/hossfeldt-eustis-3D-geologic.JPG 3-D geologic diagram of the Lombard thrust, the Hossfeldt anticline and the Eustis syncline, Montana Montana,USA http://usgeologymorphology.com/hossfeldt-anticl-eustis-cross-section-800px.jpg cross-section of the Lombard thrust, the Hossfeldt anticline and the Eustis syncline, Montana Montana,USA http://usgeologymorphology.com/Lombard-thrust-p-ref.html 2016-11-28 Monthly http://usgeologymorphology.com/adirondacks-p1.html 2016-11-15 monthly http://usgeologymorphology.com/grenville-orogen-map-504px.jpg Map of North America showing the Grenville orogen and older geologic provinces New York,USA http://usgeologymorphology.com/adirondacks-elevn-map-700px.jpg Elevation map of the Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondack-geol-map-812px.jpg Generalized geologic map of the Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondacks-tect-model-H600px.jpg Tectonic model of the history of the Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondacks-p2.html 2016-11-15 monthly http://usgeologymorphology.com/2408-marble-hailesboro-800px.jpg Lower Marble between Gouverneur and Hailesboro, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2411-marble-hailesboro-closeup-800px.jpg Lower marble close-up, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2420-popple-hill-gneiss-800px.jpg Popple Hill gneiss, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2421-popple-hill-gneiss-close-up-800px.jpg Popple Hill gneiss close-up, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2417-popple-hill-gneiss-leucosome-800px.jpg Popple Hill gneiss leucosome, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2419-popple-hill-gneiss-boudinage-800px.jpg Boudinaged leucosomes in Popple Hill gneiss, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondacks-p3.html 2016-11-15 monthly http://usgeologymorphology.com/2423-deformed-anorthosite-800px.jpg Deformed anorthosite in the Carthage-Colton shear zone, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2425-CCSZ-mylonite-800px.jpg CCSZ mylonite, southwest of Harrisville, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2424-CCSZ-mylonite-closeup-800px.jpg close-up of CCSZ mylonite, southwest of Harrisville, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondacks-p4.html 2016-11-15 monthly http://usgeologymorphology.com/2313-royal-mt-tonalite-800px.jpg Royal Mountain tonalite, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2319-irving-pond-quartzite-800px.jpg Irving Pond quartzite, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2311-charnockite-800px.jpg Charnockite on Rt. 10 north of Canada Lake, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2304-peck-lake-metapelite-800px.jpg Peck Lake metapelite, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2303-peck-lake-metapelite-closeup-800px.jpg Peck Lake metapelite close-up, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondacks-p5.html 2016-11-15 monthly http://usgeologymorphology.com/2320-roaring-brook-anorthosite-H500px.jpg anorthosite at the base of Roaring Brook Falls, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2385-roaring brook-anorthosite-closeup-800px.jpg close-up of anorthosite at the base of Roaring Brook Falls, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2402-the-branch-mafic-vein-800px.jpg Anorthosite with mafic vein in The Branch bed, north of Elizabethtown, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2403-the-branch-felsic-vein-800px.jpg Anorthosite with felsic vein in The Branch bed, north of Elizabethtown, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2329-split-rock-anorthosite-gabbro-800px.jpg Anorthosite and gabbro near Split Rock Falls, south of Elizabethtown, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2331-split-rock-gabbroic-anorthosite-800px.jpg Close-up of gabbroic anorthosite near Split Rock Falls, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2393-split-rock-gabbro-800px.jpg Close-up of gabbro near Split Rock Falls New York,USA http://usgeologymorphology.com/adirondacks-p6.html 2016-11-15 monthly http://usgeologymorphology.com/2395-garnet-megacryst-800px.jpg Deformed anorthositic-gabbroic gneiss with large garnet megacryst, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2344-hulls-falls-keene-gneiss-800px.jpg Keene gneiss at Hulls Falls, East Branch of Ausable River, south of Keene, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2436-pumpkin-hollow-gabbro-anorthosite-800px.jpg Gabbro and anorthositic gabbro, west of Pumpkin Hollow, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2373-tupper-lake-mangerite-800px.jpg Mangerite south of Tupper Lake, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2376-tupper-lake-mangerite-closeup-800px.jpg close-up of mangerite south of Tupper Lake, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondacks-p7.html 2016-11-15 monthly http://usgeologymorphology.com/2439-highlands-folded-marble-800px.jpg Folded marble and calcsilicate east of Speculator, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2366-tupper-lake-calcsilicate-granite-800px.jpg Calcsilicate and granite south of Tupper Lake, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2365-tupper-lake-calcsilicate-granite-closeup-800px.jpg close-up of calcsilicate and granite south of Tupper Lake, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2455-lyons-falls-800px.jpg Lyons Falls, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2459-lyons-falls-amphibolite-800px.jpg Lyons Falls amphibolite gneiss, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2463-agers-falls-800px.jpg Agers Falls on the Moose River, east of Lyons Falls, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2464-agers-falls-qtz-sillim-800px.jpg Agers Falls leucogranite with quartz-sillimanite segregations, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/2465-agers-falls-pegmatite-veins-800px.jpg Agers Falls leucogranite with pegmatite veins, Adirondack Mountains, New York New York,USA http://usgeologymorphology.com/adirondacks-p-ref.html 2016-11-15 Monthly http://usgeologymorphology.com/http://usgeologymorphology.com/adirondacks-p-gloss.html 2016-11-15 Monthly http://usgeologymorphology.com/QAPF-diagram-plutonic-H500px.jpg Plutonic rocks QAPF diagram http://usgeologymorphology.com/AFM-diagram-300px.jpg Igneous rocks AFM diagram; tholeiitic and calc-alkaline rocks