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You are browsing the archive for 2015 October 26.

26 October 2015

Tool marks, trace fossils, and flute casts from the Brallier Formation

Another gem from Saturday’s Historical Geology field trip: the bottom of a fine sandstone bed in the Devonian Brallier Formation, showing a variety of primary sedimentary structures, including tool marks, trace fossils, and several flute casts. Current flow direction here would have been from upper left toward lower right. Here’s a version of the photo with a few of these features highlighted:

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