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This is a subvertical bedding plane (220° / 80°, right hand rule) of the late Ordovician Martinsburg Formation, showing the bottom of a turbidite bed. Several features are visible in this bottom-up perspective.
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- 202
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- 32
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Outcrop of the late-Ordovician-aged Martinsburg Formation (turbidites/flysch) shed off the Taconian Orogen to the east into the adjacent deep marine basin. The strata were later tilted and cleaved during Alleghanian mountain-building.
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This outcrop of the late Ordovician Martinsburg Formation is located on Route 644 in Shenandoah County, about 20 feet above the North Fork of the Shenandoah River. GigaPan Stitch seems to have had some issues putting it together, which is frustrating. Still, there's a lot to be seen. At this outcrop, bedding is o...
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The Massanutten Sandstone is a Silurian-aged quartz arenite that crops out in the center of the greater Shenandoah Valley. It is resistant to erosion, and holds up the ridges of the Massanutten mountain system. To explore the outcrop this was collected from, click here: gigapan.com/gigapans/113759 Image...
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- 111
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- 29
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This outcrop is located on Rt 522 on the western limb of the Mt Pleasant Syncline showing Devonian-age marine clastic sediments of the Foreknobs Formation. This is the lower section of the Foreknobs, which is the Mallow Member according to current stratigraphic division This image is part of the MAGIC (Mid Atlantic ...
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- 154
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- Martinsburg Formation, Millner Road (near Deer Rapids Road), Shenandoah County, Virginia by Callan Bentley
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This outcrop of the late Ordovician Martinsburg Formation is located on Route 644 in Shenandoah County, about 60 feet above the North Fork of the Shenandoah River. At this outcrop, bedding is oriented 042°, 72° (right hand rule: it strikes N42°E, and dips 72° to the southeast). Cleavage is oriented 212°, 83° (...
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Cross-sectional view of inclined Martinsburg Formation beds (020°, 62° right hand rule). Take a look and ask yourself: What's the structure doing here? :)
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- 100
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- 28
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Fanglomerate from the western margin of the Triassic-aged Culpeper Basin rift valley in northern Virginia.
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- 651
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- 27
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Carbonate sedimentologists will know and love this one - it's one of the classic world-class localities for understanding the geology of Permian-aged reef complexes.
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Metamorphosed mudstone, stratigraphically above (east) of the Weverton Formation here in the easternmost Blue Ridge province. Exposure is on the railroad tracks just north of Chapman's Mill, at Thoroughfare Gap, Virginia.
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- 26

