Pennsylvania Geological Survey - Historical Photographs

Active Filters:
  • Location Covered = Mifflin
  • Original Format = Photographs
  • Date = 1936-08

About This Collection

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

Displaying 4 items
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Mifflin Coal and Sandstone
Ridgeley sandstone
Ridgeley sandstone
Ridgeley sandstone