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

Near contact, Chemung-Catskill

Subject	Stratigraphy
Creator	Moseley, John Reed

New roadcut, Pottsville sandstone (?)

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-09-29

North of Ellerslie, Maryland, in Pennsylvania

Subject	Stratigraphy
Creator	Cleaves, Arthur B. (Arthur Bailey), 1905-1985
Date	1936-08

North of Ellerslie, Maryland, in Pennsylvania

Subject	Stratigraphy
Creator	Cleaves, Arthur B. (Arthur Bailey), 1905-1985
Date	1936-08

NYC (New York Central) Railroad cut

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

NYC (New York Central) Railroad cut at Sutton

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

Oil wells in Sturgeon

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

Old abandoned sandstone quarry

Subject	Stratigraphy
Creator	Graeber, Charles Karsner, 1896-
Date	1934-08-21

Old clay stripping and mine

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

Old Port Formation

Subject	Stratigraphy
Creator	Wilshusen, John P.
Date	1975-10

Old Port Formation

Subject	Stratigraphy
Creator	Wilshusen, John P.
Date	1975-10

Olean conglomerate

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1942-05

Olean conglomerate

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1942-05

Olean conglomerate

Subject	Stratigraphy
Creator	Shaffner, Marchant N. (Marchant Nissley), 1897-1990
Date	1937-05-29

Olean conglomerate

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1942-05

Olean sandstone, Brown's Run

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1928-10-08

Olean sandstone on Browns Run

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1928-10-08

Oneida (?) conglomerate

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-04-01

Oneida-Medina rock flow

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-04-01

Onondaga Quarry

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1932-07-01

Ordovician contact

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1929

Ordovician green slate quarry

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-11-12

Ordovician-Silurian contact

Subject	Stratigraphy
Creator	Bolles, William H.
Date	1970-10

Ordovician-Silurian contact

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1929

Ordovician-Silurian contact

Date
Subject	Stratigraphy Sedimentation
Creator	Willard, Bradford, 1894-

Oriskany sandstone

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-08-02

Oriskany sandstone

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-08-02

Oriskany (Shriver) limestone

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1925-07-15

"Oswego" conglomerate

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-08-02

Oswego or Bald Eagle sandstone

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

Oswego sandstone

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

Oswego sandstone

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

Outcrop Brookville coal

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-09-22

Outcrop of Catskill red rock on Kettle Creek

Subject	Stratigraphy
Creator	Johnson, Meredith E., 1897-
Date	1926-07-22

Outcrop of Lower Mercer limestone

Subject	Stratigraphy
Creator	Graeber, Charles Karsner, 1896-
Date	1934-08-01

Outcrop of Oriskany

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

Outcrop of Triassic conglomerate ledge

Subject	Stratigraphy
Date	1921-07-01

Overturned cryptozoons

Subject	Stratigraphy
Creator	Geyer, Alan R.
Date	1953

Paint ores in quarry east of Lenhartsville

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1932-05-28

Parkhead (?) sandstone cross-bedding in Chemung

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1935-09-30

Paxtang Limestone Quarry

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1932-04-01

Paxtang Limestone Quarry

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1932-04-01

Paxtang Limestone Quarry

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1932-04-01

Pebbly sandstone in Gettysburg shale

Subject	Stratigraphy
Creator	Hickok, W. O. (William Orville), 1905-
Date	1932-06-01

Pennsylvanian siltstones, sandstones, and shales

Subject	Stratigraphy
Creator	Bolles, William H.
Date	1970

Perkasie Member of Brunswick Formation

Subject	Stratigraphy
Creator	Inners, Jon D.
Date	1973-03

Peters Creek Schist

Subject	Stratigraphy
Creator	Geyer, Alan R.

Peters Creek Schist

Subject	Stratigraphy
Creator	Geyer, Alan R.

Peters Creek Schist

Subject	Stratigraphy
Creator	Geyer, Alan R.

Pinching out of beds

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