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North side of Calvert Street, east side of the Duke Ellington Bridge over Rock Creek. An interesting example of weathering in the urban environment.
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- 691
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Along the Rockfish River, south of Charlottesville, Virginia, in the Blue Ridge province, there is a gorgeous quarry exposure of the Rockfish Conglomerate, a Neoproterozoic matrix-supported conglomerate with a mix of rounded and angular clasts, perhaps indicative of ancient (Snowball Earth) glacial outwash.
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- 14
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- 3536
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- 1
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A Sevier-style thrust fault exposed west of Augusta, Montana, the French Thrust has emplaced Mississippian carbonates on top of Cretaceous shales. On the left (east), there is also some till, outwash, and colluvium. View is approximately to the south.
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- 10
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- 3392
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Looking west at the extended "rock scramble" part of the trail up Old Rag Mountain in Shenandoah National Park, Virginia. At the far right in the distance, the summit of the mountain may be observed.
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- 3335
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Weathering pits called opferkessel form atop rock exposures due to chemical and physical weathering. They may superficially resemble potholes, but are not caused by vortices of swirling water "drilling" into the rock. The water trapped in the opferkessel may host small ecosystems with surprising organisms.
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- 3215
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An exposure of the Mather Gorge Formation, downstream of the "emergency exit" trail off Billy Goat Trail loop A, and upstream of the first sandy beach. Immediately upstream of this outcrop is a prominent belt of amphibolite, and there are large angular amphibolite boudin blocks embedded in this strange rock. ...
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- 12
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- 3150
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This is what a geology professor's office looks like. This gigapan documents the state of my southern bookshelf at the Annandale campus of Northern Virginia Community College (NOVA), as of May, 2011. Books and rocks share space with oddities and memorabilia. Have fun exploring!
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- 3128
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Rhythmites are rhythmically-bedding sedimentary deposits, deposited in a sedimentary basin with some regularly-shifting condition like tidal cycles or day/night changes. The gigapan shows an outcrop of the Konnarock Formation, a bit east of Konnarock, Virginia, in the Blue Ridge province. They are Proterozoic in age. T...
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- 2895
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- Contact between Tensleep Formation & Goose Egg Formation, east of Shell, Wyoming by Callan Bentley
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West of Shell, Wyoming, on route 14, there is a lovely exposure showing the tilted stratigraphic contact between the lower Tensleep Formation (purple; Pennsylvanian period) underneath Goose Egg Formation (orange/tan; Permian to Triassic in age). The contact dips to the west because it has been deformed during Laramide ...
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- 2
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- 2881
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- 1
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Stats
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- 3
- Total Views
- 2832
- Explore Score
- 1
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