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NASA - Glacier Shear Margin

Glacier Shear Margin

Stromatolites.

Stromatolites of the Helena Formation, Grinnell Glacier Cirque, Montana - Mountain Beltway

Another picture of the diorite sill found within the Helena formation at Grinnell Glacier. Note the light colored limestone that has been contact metamorphosed above and below this intrusion.

Student guest post: the Belt Supergroup in Glacier National Park - Mountain Beltway

Disso Voce Sabia?: Cratera misteriosa no fundo de lagoa intriga agricultores nos EUA

Sinkhole Incidents On the Rise - Earth Changes and the Pole Shift

chimney-rock3.jpg (675×900)

Chimney Rock and UT 24 : Chimney Rock Trail, Capitol Reef National Park, Utah

August 1994 near-vertical aerial photograph of part of the surface of the Bering Glacier showing a number of tightly folded and contorted crevasses. Field of view is ~1/8 mile

August 1994 near-vertical aerial photograph of part of the surface of the Bering Glacier showing a number of tightly folded and contorted crevasses. Field of view is mile

The Neoproterozoic Purcell Sill is a stark, obvious black stripe in the strata of Glacier National Park. Here it is emerging from behind “The Salamander” glacier, above Grinnell Glacier Cirque

The Neoproterozoic Purcell Sill is a stark, obvious black stripe in the strata of Glacier National Park. Here it is emerging from behind “The Salamander” glacier, above Grinnell Glacier Cirque

Djibouti's Lake Assal is one of the world's saltiest lakes. Intense heat and strong winds fuel rapid evaporation, leaving a bathtub ring of minerals around the lake's shore.

Lake Assal, Djibouti Photograph by George Steinmetz, National Geographic Djibouti’s Lake Assal is one of the world’s saltiest lakes. Intense heat and strong winds fuel rapid evaporation, leaving a bathtub ring of minerals around the lake’s shore.

Columnar jointing at Studen Kladenets, near dam on Arda Rica, Rhodopes, Bulgaria. High-K andsesites younger than 30.2 ma (Singer and Marchev, 2001). This outrop was visited during the Geneva SEG student chapter field trip in Bulgaria, 6-14 May 2003. Width of photo: 10 m.

Columnar jointing at Studen Kladenets, near dam on Arda Rica, Rhodopes, Bulgaria.

This photo shows mud chip rip-up clasts in the Grinnell Formation, and is indicative of an ancient storm. The high energy currents carried sand and ripped up clay particles which were deposited into the muddy surroundings.

Student guest post: the Belt Supergroup in Glacier National Park - Mountain Beltway

Hug Point Geologic Oddities, Layers, Walking Tour

Hug Point Geologic Oddities, Layers, Walking Tour

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