Pennsylvania Geological Survey - Historical Photographs - Browse all items - Pennsylvania Photos and Documents

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Pennsylvania Geological Survey - Historical Photographs - Browse all items - Pennsylvania Photos and Documents

Campbell's Ledge from west banks

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1932-05-13

Camp on Twin Island

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-10-01

Camp on Twin Island

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-10-01

Camp on Twin Island

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-10-01

Camp, Pohopoco Creek

Subject	Miscellaneous
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1921-08-03

Camp, School house grounds

Subject	Miscellaneous
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1922-08-06

Campus at Bryn Mawr

Subject	Cities, Towns, and Buildings
Creator	Ashley, Geo. H. (George Hall), 1866-1951

Campus at Bryn Mawr College

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951

Campus at Lafayette

Subject	Cities, Towns, and Buildings
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1907

Campus at Lafayette College

Subject	Cities, Towns, and Buildings
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1907

Campus at Lafayette College

Subject	Cities, Towns, and Buildings
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1907

Campus at Lafayette College

Subject	Cities, Towns, and Buildings
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1907

Canal and outcrop of Conococheague limestone

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-07-31

Canal plane and power house

Subject	Cities, Towns, and Buildings
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1923-10-01

Capped well just drilled for public water supply for Mansfield State College.

Subject	Groundwater
Creator	Geyer, Alan R.
Date

Carlim (at left) Lemont (timbered not mined) Lowville (right)

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date

Carlim limestone (at back) wall of Lemont at left (not mined here)

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date

Carmichaels debris at Natrona

Subject	Environmental Geology
Creator	Hughes, H. Herbert (Harry Herbert), 1905-
Date	1927-10-01

Carmichaels terrace above Ford City

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1928-09-18

Carper Magnetite Mine

Subject	Metallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1938-06-14

Carson limestone quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1929-04-24

Cascade and water power tunnel

Subject	Surface Water
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1931-11-12

C. A. Spiker limestone quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1923-07-11

Casselman River

Subject	Surface Water
Creator	Sisler, James D. (James Donaldson), 1894-

Casselman River

Subject	Surface Water
Creator	Sisler, James D. (James Donaldson), 1894-

Casselman River

Subject	Surface Water
Creator	Sisler, James D. (James Donaldson), 1894-

Casselman River Gorge

Subject	Surface Water
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1935-05-25

Casts and molds of brachiopods in Oriskany Formation sandstone

Subject	Trace Fossils
Creator	Bolles, William H.
Date	1971-08-25

Catholic Church

Subject	Cities, Towns, and Buildings
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1928-08-30

Catskill Formation

Subject	Stratigraphy
Creator	Geyer, Alan R.
Date	1971-08-18

Catskill Formation, one-half mile of outcrop

Subject	Stratigraphy
Creator	Bolles, William H.
Date	1970-04

Catskill Formation rockfall

Subject	Rockfalls
Date	1970-05

Catskill sandstone

Subject	Cities, Towns, and Buildings
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1930-05-15

Catskill sandstone

Subject	Cities, Towns, and Buildings
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1930-05-15

Catskill sandstone

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-07-16

Catskill sandstone and shale

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1927-10-11

Catskill (?) sandstone outcrops in Raymonds Kill

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date

Catskill shale

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1923-08-21

Catskill shale and sandstone (near base)

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1923-08-21

Catskill Summit

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1937-08-14

Catskill topography

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-06-01

Catskill topography

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-06-01

Cave and spring, Buffalo Creek

Subject	Caves
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1935-05-16

Cave at Arch Spring

Subject	Caves
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-08-23

Cave at Arch Spring

Subject	Caves
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-08-23

Cave concretions

Subject	Caves
Creator	Hickok, W. O. (William Orville), 1905-
Date	1932-05-25

Cave formed by fold in limestone

Subject	Stratigraphy-Weathering
Creator	Ashley, Geo. H. (George Hall), 1866-1951

Cave in Helderberg limestone

Subject	Caves
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1931-05-18

Cave-in of roof over "B" coal

Subject	Mineral Resources-Coal
Creator	Ashley, Geo. H. (George Hall), 1866-1951

Cave in quarry at Winfield

Subject	Caves
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1931-05-18