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- 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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- Kink banding in Laurel Formation of Rock Creek Shear Zone, Broad Branch, Washington, DC by Callan Bentley
-
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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- 39
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Kersten Glacier upper margin, just below Uhuru Peak. Original images are a tad fuzzy due to manual focus.
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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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