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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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- 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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This is a classic outcrop in Appalachian stratigraphy. Overall, it shows the transition from the passive margin sedimentation (limestone) of the Cambrian and early Ordovician Sauk and Tippecanoe epeiric seas into the increasing clastic (sand and mud) influence of active margin sedimentation associated with the onset of...
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Looking downstream on the Potomac River from the southern end of Billy Goat Trail, loop A, in Chesapeake and Ohio Canal National Historical Park, Maryland. The other side of the river is Virginia. On the hill is Madeira School, and the confluence with Difficult Run is directly across the river in the narrow valley. Roc...
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Exposed on the northern bank of the Chesapeake and Ohio Canal near the downstream end of "Widewater" (upstream of the Old Anglers Inn access point), these rocks are the result of ancient mountain-building processes. These rocks, the Mather Gorge Formation, were originally deposited as layers of sand and mud i...
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Exposed on the northern bank of the Chesapeake and Ohio Canal near the downstream end of "Widewater" (upstream of the Old Anglers Inn access point), this antiform is the result of ancient mountain-building processes. A fold that goes up in the middle is called an "antiform," and if there is stratigr...
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