Pennsylvania Geological Survey - Historical Photographs

Active Filters:
  • Location Covered = Blair
  • Contributing Institution = Pennsylvania Geological Survey
  • Subject = Stratigraphy

About This Collection

This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.
Displaying 25 items
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At base of (Mauch Chunk) (?) crossbedded sandstone etc.
At base of (Mauch Chunk) (?) crossbedded sandstone etc.
Stratigraphy
At base of (Mauch Chunk) (?) crossbedded sandstone etc. Some of sandstone is quartz conglomerate. Near Allegrippus., 18-13
Base of Catskill (at left of figure) top of Chemung (right)
Base of Catskill (at left of figure) top of Chemung (right)
Stratigraphy
Base of Catskill (at left of figure) top of Chemung (right). Chemung fossiliferous (no bright red), a characteristic ferruginous bed near top traceable, two miles below Horseshoe Curve
Beekmantown dolomite railroad cut
Beekmantown dolomite railroad cut
Stratigraphy
Beekmantown dolomite railroad cut near mouth of Elk Run east of Tyrone.
Catskill shale
Catskill shale
Stratigraphy
Catskill shale, one half mile below Horseshoe Curve., 18-32
Catskill shale and sandstone (near base)
Catskill shale and sandstone (near base)
Stratigraphy
Catskill shale and sandstone (near base), two miles below Horseshoe Curve., 18-34
Characteristic bedding
Characteristic bedding
Stratigraphy, Sedimentation
Characteristic bedding (Catskill or Chemung?). Below Horseshoe Curve.
Connoquenessing sandstone (?)
Connoquenessing sandstone (?)
Stratigraphy
Connoquenessing sandstone (?) at bend due west from Allegrippus., 18-12
Contact of Dm and Don
Contact of Dm and Don
Stratigraphy
Contact of Dm and Don. Hammer rests upon sandy shale at base of Dm. Below hammer is Don limestone; above it, Dm black shale. Near Vail, Pa.
Crushed and molded
Crushed and molded
Stratigraphy
Crushed and molded, railroad cut west of Birmingham Station.
Eighty foot sandstone in Mauch Chunk
Eighty foot sandstone in Mauch Chunk
Stratigraphy
Eighty foot sandstone in Mauch Chunk, just west of Allegrippus., 18-15
Fault in Chemung rocks
Fault in Chemung rocks
Stratigraphy
Fault in Chemung rocks, three miles below Horseshoe Curve., 18-37
Helderberg-Oriskany transitional contact
Helderberg-Oriskany transitional contact
Stratigraphy
Helderberg-Oriskany transitional contact at small dam on Bald Eagle Creek. Seated figure approximately on contact. Dhb to left, Do to right.
Helderburg-Tonoloway limestone
Helderburg-Tonoloway limestone
Stratigraphy
Helderburg-Tonoloway limestone (contact six feet to right of recess),Tyrone (Ward House garden in foreground)., 20-5
Highly dipping Bellefonte strata
Highly dipping Bellefonte strata
Stratigraphy
Highly dipping Bellefonte strata, railroad cut near Ironville.
Limestone quarry, Canoe Creek Stone Company
Limestone quarry, Canoe Creek Stone Company
Stratigraphy
Limestone quarry, Canoe Creek Stone Company, Canoe Creek
Loyalhanna limestone 40 feet thick cross-bedded siliceous limestone (lower half of rock exposure)
Loyalhanna limestone 40 feet thick cross-bedded siliceous limestone (lower half of rock exposure)
Stratigraphy
Loyalhanna limestone 40 feet thick cross-bedded siliceous limestone (lower half of rock exposure), Allegrippus., 18-16; use lens to see details.
Loyalhanna limestone and Burgoon sandstone 300 feet
Loyalhanna limestone and Burgoon sandstone 300 feet
Stratigraphy
Loyalhanna limestone and Burgoon sandstone 300 feet (20 feet at left, 60 feet at east), Allegrippus., 18-19
Loyalhanna limestone (upper half of rock exposure) in contact with top of Pocono sandstone
Loyalhanna limestone (upper half of rock exposure) in contact with top of Pocono sandstone
Stratigraphy
Loyalhanna limestone (upper half of rock exposure) in contact with top of Pocono sandstone, Allegrippus., 18-17
Mercer shale, Homewood sandstone above Connoquenessing below
Mercer shale, Homewood sandstone above Connoquenessing below
Stratigraphy
Mercer shale, Homewood sandstone above Connoquenessing below, from just west of Bennington., 18-9
Oriskany (Shriver) limestone
Oriskany (Shriver) limestone
Stratigraphy
Oriskany (Shriver) limestone, hill one mile east of Hollidaysburg