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

Change of dip in Triassic sediments

Subject	Stratigraphy
Creator	Bissell, Malcolm H.; Stose, George Willis, 1869-1960
Date	1928

Channel (?)

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1931-08-01

Channel sandstone in Mauch Chunk red beds

Subject	Stratigraphy
Creator	Shaffner, Marchant N. (Marchant Nissley), 1897-1990
Date	1952

Characteristic alternation of sandstone and shale

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1923-10-03

Characteristic bedding

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

Chemung rocks in road cut

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-08-27

Chemung sandstone at covered bridge over Brush Creek

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1936-10-16

Chemung sandstone below covered bridge, Brush Creek

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1936-10-16

Chemung sandstone, below covered bridge, Brush Creek

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1936-10-16

Chemung strata at Brush Creek

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1935-09-10

Clarion Nos. 2 and 3 coals in strip mine highwall


Subject	Stratigraphy Mineral Resources-Coal
Creator	Inners, Jon D.

Clarion sandstone (?) west side of Piney Run

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1936-04-17

Clarion sandstone (?) west side of Piney Run

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1936-04-17

Clarksburg limestone and clay along Noblestown Road

Subject	Stratigraphy
Creator	Johnson, Meredith E., 1897-
Date	1925-06-05

Cliff directly across Allegheny River from Freeport

Subject	Stratigraphy
Creator	Hughes, H. Herbert (Harry Herbert), 1905-
Date	1927-07-01

Cliff in Peters Creek Formation grading into Tucquan schist

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-06-04

Cliff of Catskill?

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

Cliff of Girard Shale

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-07-31

Cliff of Girard Shale

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-07-31

Cliff of Mahoning sandstone along Youghiogheny River

Subject	Stratigraphy
Creator	Hickok, W. O. (William Orville), 1905-
Date	1934-07-01

Cliff of Peters Creek Formation

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-06-04

Cliff of Pocono sandstone

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

Cliff section, Natrona

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

Cliff section, Natrona

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

"Clinton" red shales

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-07-01

"Clinton" Shale and sandstone beds

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-07-01

Close-up of conglomerate

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

Close up of decayed Triassic conglomerate quartz pebbles in soil and sand

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

Close-up of edgewise conglomerate

Subject	Stratigraphy
Creator	Moseley, John Reed
Date	1950

Close-up of excavation

Subject	Stratigraphy
Creator	Craft, Jesse L.

Close-up of flint clay in stripping


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

Close up of Oswego sandstone

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-05-16

Close up of Salamanca (?) sandstone at Bradford Brick Company quarry

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

Close up of sandy shale beds near top of upper quarry

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-08-27

Close up of sandy shale near top of quarry

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-08-27

Close up to show fracture or cleavage in Martinsburg

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-07-29

Close-up view of Homewood sandstone at Bilgers

Subject	Stratigraphy
Creator	Lohman, Stanley William, 1907-
Date	1934

Coal bloom in road

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1925-10-31

"Coal" prospects in Ordovician black shale


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

Cockeysville Marble

Subject	Stratigraphy
Creator	Geyer, Alan R.
Date	1969

Cockeysville marble quarry

Subject	Stratigraphy
Creator	Geyer, Alan R.
Date	1971

Column of Pottsville sandstone


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

Column of Pottsville sandstone


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

Concentric ledges of Oriskany sandstone

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1930-08-01

Conemaugh rocks (Morgantown? sandstone?)

Subject	Stratigraphy

Conestoga Formation

Subject	Stratigraphy
Creator	Bolles, William H.
Date	1970

Conestoga limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1934-09-27

Conglomerate and trash running transverse to bedding

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1923-10-03

Conglomerate base of Buffalo sandstone

Subject	Stratigraphy
Creator	Johnson, Meredith E., 1897-
Date	1923-05-22

Conglomerate faulted against base of Tuscarora


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