An example of the layered nature and differential erosion of the stratigraphy exposed along the walls in Block Canyon.  Thinner layers are most likely porcellanite and the thicker bio-eroded layers are probably chalk.

An example of the layered nature and differential erosion of the stratigraphy exposed along the walls in Block Canyon. Thinner layers are most likely porcellanite and the thicker bio-eroded layers are probably chalk. Image courtesy of NOAA Okeanos Explorer Program, 2013 Northeast U.S. Canyons Expedition.

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Related Links

Northeast U.S. Canyons Expedition 2013: August 13 Log

Northeast U.S. Canyons Expedition 2013

NOAA Ship Okeanos Explorer