Pennsylvania Geological Survey - Historical Photographs

Active Filters:
  • Location Covered = Blair

About This Collection

This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.
Displaying 99 items
Filter
Abandoned coke ovens
Abandoned coke ovens
Nonmetallic Mineral Resources
Abandoned coke ovens north of east portal of Gallitzin Tunnel., 18-7
Active quarry
Active quarry
Nonmetallic Mineral Resources
Active quarry, Elk Run, near Ironville.
Allegheny Front
Allegheny Front
Topography
Allegheny Front, view east of south hill. From near location of card #1115., 18-22
Allegheny Front, from Penn Highway
Allegheny Front, from Penn Highway
Topography
Allegheny Front, from Penn Highway west of Duncansville, Blair County.
Approaching Horseshoe Curve from south
Approaching Horseshoe Curve from south
Topography
Approaching Horseshoe Curve from south., 18-28
Arch Spring from upper end of tunnel in sinkhole
Arch Spring from upper end of tunnel in sinkhole
Sinkholes
Arch Spring from upper end of tunnel in sinkhole. Note daylight seen through opening. Arch Spring, Blair County.
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
Basalt Trap Rock Company Plant (in course of construction)
Basalt Trap Rock Company Plant (in course of construction)
Metallic Mineral Resources
Basalt Trap Rock Company Plant (in course of construction), Cove Forge
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.
Bent strata
Bent strata
Structure-Folds
Bent strata, railroad cut west of Birmingham Station.
"Bracken fern"
"Bracken fern"
Topography
"Bracken fern," Sta. no. 24, Pennsylvania Railroad above Horseshoe Curve., 18-24
Brick kilns, Standard Refractories Company
Brick kilns, Standard Refractories Company
Nonmetallic Mineral Resources
Brick kilns, Standard Refractories Company. Claysburg, Blair County.
Brick plant using Portage shale
Brick plant using Portage shale
Nonmetallic Mineral Resources
Brick plant using Portage shale, northern edge of Hollidaysburg quadrangle., 18-40
Bridge on Lake to Sea Highway over Little Juniata River at Ironville
Bridge on Lake to Sea Highway over Little Juniata River at Ironville
Topography
Bridge on Lake to Sea Highway over Little Juniata River at Ironville, Tyrone quadrangle.
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
Cave at Arch Spring
Cave at Arch Spring
Caves
Cave at Arch Spring., Inside looking out.
Cave at Arch Spring
Cave at Arch Spring
Caves
Cave at Arch Spring.
Characteristic bedding
Characteristic bedding
Stratigraphy, Sedimentation
Characteristic bedding (Catskill or Chemung?). Below Horseshoe Curve.