Cliff-former
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A cliff-former is a geological unit of bedrock that is more resistant to erosion than overlying or underlying strata and consequently produces outcrops with high slope angles. It is more or less equiv
Cliff-forming Tuscarora Quartzite outcrop in West Virginia
Juniata Formation
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The Ordovician Juniata Formation is a mapped bedrock unit in Pennsylvania, West Virginia, Virginia, Tennessee, and Maryland. It is a relative slope-former occurring between the two prominent ridge-for
Outcrop on U.S. Route 522 at Blacklog Narrows southeast of Orbisonia, Pennsylvania.
Conformable contact of overlying Tuscarora Formation (white rock, left) with underlying Juniata Formation (red rock, right) at the Narrows along rt. 30 in Bedford County, Pennsylvania.
Sample from roadcut on U.S. Route 322 near State College, Pennsylvania, showing slickensides