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

Detail of Pottsville sandstone

Subject	Stratigraphy Sedimentation
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-12-01

Detail of sand bank

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-09-30

Detail of slate quarry

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

Detail of spheroidal weathering in Hamilton shale

Subject	Sedimentation
Creator	Willard, Bradford, 1894-
Date	1934-09-20

Detail of Tully limestone across river from Lock Haven

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1934-10

Details in gravel pit near Dickville

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1931-07-01

Details in Peters Creek Formation in railroad cut

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

Details of Chapel, Mercersburg Academy

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

Details of weathered limestone quarry

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

Detrital character of Rockdale Run Formation

Subject	Stratigraphy
Creator	Root, Samuel I.
Date	1972-09-21

Devils Den, Gettysburg battlefield

Subject	Caves
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1927-04-29

Devonian Hamilton strata

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-05-01

Devonian Hamilton strata

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

Devonian-Ordovician contact near Catskill, New York

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1931-10-01

Devonian tree stumps

Subject	Fossils
Creator	Willard, Bradford, 1894-
Date	1931-10-01

Devonian Trilobite, Phacops

Subject	Fossils
Creator	Bolles, William H.

Dewatering and conveying scraper line delivering boiler fuel to boiler house

Subject	Mineral Resources-Coal
Creator	Fraser, Thomas
Date

Diabase at quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1931-11-05

Diabase blocks

Subject	Nonmetallic Mineral Resources
Creator	Hickok, W. O. (William Orville), 1905-
Date	1932-04-24

Diabase boulders

Subject	Boulder Field
Creator	Bolles, William H.
Date	1971-09

Diabase boulders in Conewago Creek

Subject	Rivers and Streams
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1927-04-29

Diabase boulders north of Sugarloaf

Subject	Boulder Field
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-05-04

Diabase boulders north of Sugarloaf

Subject	Boulder Field
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-05-04

Diabase boulders, Triassic age

Subject	Igneous and Metamorphic
Creator	Ashley, Geo. H. (George Hall), 1866-1951

Diabase boulders, undisturbed and broken

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

Diabase, checking and spalling

Subject	Weathering
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1927-04-28

Diabase cobbley in places in roadcut

Subject	Igneous and Metamorphic
Creator	Hoskins, Donald M.
Date	1975

Diabase, Devils Den

Subject	Caves
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1927-04-29

Diabase dike along Pennsylvania Turnpike

Subject	Stratigraphy
Creator	Geyer, Alan R.
Date	1955

Diabase dike along Pennsylvania Turnpike

Subject	Stratigraphy
Creator	Geyer, Alan R.
Date	1955

Diabase dike in sandstone, Cornwall

Subject	Metallic Mineral Resources
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-08-17

Diabase float from dike

Subject	Engineering Geology
Creator	Bolles, William H.
Date	1970

Diabase float from dike

Subject	Engineering Geology
Creator	Bolles, William H.
Date	1970

Diabase footwall

Subject	Metallic Mineral Resources
Creator	Geyer, Alan R.
Date	1952

Diabase, French Creek Granite Company

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

Diabase, French Creek Granite Company

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

Diabase, Heidelberg Reformed Church

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

Diabase in electric railway culvert

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

Diabase in roadcut through Ironstone Ridge

Subject	Igneous and Metamorphic
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date

Diabase in stone walls, Gettysburg battlefield

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

Diabase in Washington's Headquarters

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

Diabase joints

Subject	Structure
Creator	Geyer, Alan R.
Date	1969-12

Diabase quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-11-13

Diabase quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-07-10

Diabase quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1931-11-05

Diabase quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1931-11-05

Diabase quarry

Subject	Nonmetallic Mineral Resources
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1931-11-05

Diabase quarry, Black Diamond Granite Company

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

Diabase quarry, Black Diamond Granite Company

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

Diabase quarry, French Creek Granite Company monument stock

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