26 October 2015
Tool marks, trace fossils, and flute casts from the Brallier Formation
Posted by Callan Bentley
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: