Arch Rock Pennsylvania 5-22-2010 An excellent exposure example of a asymmetrical anticline-syncline sequence of the Keefer Formation from the Silurian age. At a road cut along route 322 in Pennsylvania approximately 39 miles south of State College and 2 miles northwest of Arch Rock Rd. The sequence is composed of Lower Silurian sandstones, shales,and the darker beds contain numerous trace fossils. Credit: Mark Reinstein

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Size: 3872px × 2592px
Location: Arch Rock, Pennsylvania, USA,
Photo credit: © mark reinstein / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: .., america, anticline, arch, asymmetrical, college, formation, fossils, keefer, north, pennsylvania, rock, sandstone, sequence, shale, silurian, state, states, syncline, united, usa