Pennsylvania Geological Survey - Historical Photographs

Active Filters:
  • Location Covered = Allegheny
  • Subject = Stratigraphy
  • Date = 1925-06-04

About This Collection

This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.

Displaying 6 items
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Ames limestone and 12-inch Harlem coal
Birmingham shale (top). At 25 feet below, Ames limestone.
Irregular base of Saltsburg sandstone
Irregular base of Saltsburg sandstone
Pine Creek limestone and top of Buffalo sandstone
To show irregular character of Saltsburg sandstone (note lensing)