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You are browsing the archive for 2011 April 25.

25 April 2011

Two joints

Stopped at Sideling Hill, Maryland, a few weeks back with my three Honors students, on our way to Pittsburgh for the northeast/north-central GSA section meeting. Robin took this photo of me with some sandstone beds that reveal two nice examples of joint anatomy, complementary in their structure: First focus in on the area right of where my finger is pointing. It shows well-expressed plumose structure, little lines that point in …

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