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Teeming with garnets big and small, fresh and weathered, the Setters Schist is a muscovite schist metamorphosed from a pelitic protolith in (presumably) the Taconian orogeny. It also features staurolite, which is present in this sample, and kyanite, which isn't. Sample collected in Sparks, MD. Image made as part ...
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- 487
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- Folded contact between New Market Formation (lower) and Lincolnshire Formation (upper), Staunton, Virginia by Callan Bentley
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A lovely exposure (though rather harshly lit) of the contact between two Cambro-Ordovician limestones in the Shenandoah Valley. Geologic map of the site is here: ngmdb.usgs.gov/ngm-bin/pdp/zui_viewer.pl?id=14868
The same contact can be seen in the vicinity of Strasburg, Virginia, here:
www.gigapan.com/gi...-
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- 41
- Kink banding in Laurel Formation of Rock Creek Shear Zone, Broad Branch, Washington, DC by Callan Bentley
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An exposure of highly foliated metasedimentary rock (metagraywacke) of the Laurel Formation in Broad Branch, part of Rock Creek Park, in northwest Washington, DC.
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- 178
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- 39
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Cross-sectional view of folded Martinsburg Formation beds . On the left (south), the bedding is oriented 030°, 38° (right hand rule). On the right (north), it's oriented 245°, 30° (right hand rule).
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- 169
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- 37
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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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- 164
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- 36
- Kink banding in Laurel Formation of Rock Creek Shear Zone, Broad Branch, Washington, DC by Callan Bentley
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An exposure of highly foliated metasedimentary rock (metagraywacke) of the Laurel Formation in Broad Branch, part of Rock Creek Park, in northwest Washington, DC.
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- 240
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- 35
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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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- 211
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- 34
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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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- 143
- Explore Score
- 33
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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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- 1
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- 206
- Explore Score
- 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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Stats
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- 0
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- Total Views
- 189
- Explore Score
- 31