You are browsing the archive for 17 March 2010 - Mountain Beltway.
17 March 2010
What do you think, folks? Do you like seeing field photos as I take them? Should I continue the Transect Trip instant photoblog series tomorrow as we traverse the Valley & Ridge?
Okay… That last plumose structure was nothing compared to this beauty…
Spectacular plumose structure on rusty joint surface Weverton Formation:
Bedding and cleavage intersect in the Weverton Fm. Bedding = Cambrian Cleavage = late Paleozoic (Alleghanian)
Gorgeous back-rotated quartz-filled tension gashes in the Antietam Fm. Sinistral sense of shear:
Looking down on Skolithos ichnofossils in the Antietam Fm. quartz sandstone:
A few rip-up clasts in arkosic matrix (Swift Run Fm.):
Live geoblogging continues… Here’s some nice round quartz pebbles in the Swift Run Fm: