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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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- 189
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- 31
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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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- 0
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- Total Views
- 240
- Explore Score
- 30
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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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- 208
- Explore Score
- 34
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Cambrian-aged Harpers Formation meta-mudstone exposed on the property of Arlington, Virginia's outdoor education facility, the Phoebe Hall Knipling Outdoor Lab.
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- 349
- Explore Score
- 35
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Rhosydd is one of the larger slate mines near Blaenau Ffestiniog, North Wales. Of the original 14 levels, 5 are permanently flooded and around 100 chambers are still accessible. This incline is unusual in having wide gauge rails carrying slate trucks on a wagon while a heavy counterbalance wagon ran on narrower rails s...
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- 1
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- 233
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- 1
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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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- 363
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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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- 239
- Explore Score
- 29
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This exposure of the Lower Martinsburg shows bedding within the strongly cleaved limy slate.
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- 386
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This sample is of nice structural interest. It was a shaly limestone, but then it got squeezed. Foliation developed at an angle to bedding, meaning that technically the rock now bears slaty cleavage. It's still a limestone, compositionally, but the well-developed foliation means that it's texturally a slate. Sampling l...
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- 140
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- 0
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Complex kink folds in the Lower Devonian fine-grained, siliciclastic metasediments of the core of the High-Ardenne Slate Belt (Belgium).
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- 164
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- 1

