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

Upper Freeport coal horizon

Subject	Mineral Resources-Coal
Creator	Hughes, H. Herbert (Harry Herbert), 1905-
Date	1927-09-01

Upper Freeport limestone

Subject	Stratigraphy
Creator	Graeber, Charles Karsner, 1896-
Date	1933-07-10

Upper Freeport limestone in stream bed

Subject	Stratigraphy
Creator	Hughes, H. Herbert (Harry Herbert), 1905-
Date	1927-09-01

Upper Grand Ballroom, Indian Echo Caverns

Subject	Caves
Creator	Bolles, William H.
Date	1970-11

Upper half of Allegheny and base of Conemaugh

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1928-05-23

Upper Hamilton (Moscow) shales with abundant fossils

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-05-28

Upper Mahoning sandstone exposed in roadcut

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

Upper part of Don where formation is dominantly limestone

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1934-06-22

Upper part of lower quarry

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

Upper surface of the diabase at Cornwall

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

Upper Triassic

Subject	Sedimentation
Creator	Willard, Bradford, 1894-
Date	1934-04-17

Upper Triassic

Subject	Stratigraphy
Creator	Willard, Bradford, 1894-
Date	1934-04-17

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1925-11-03

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1926-09-14

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1925-11-03

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1926-09-16

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1925-11-10

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1928-06-17

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1926-09-16

Upper Washington limestone

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1925-11-03

Upturned stones

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-04-23

U.S. Bureau of Mines coal dust explosion tunnel

Subject	Mineral Resources-Coal
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1928

U.S. Engineers dredge on Monongahela River

Subject	Rivers and Streams
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1926-09-28

Use of Berea sandstone in front of steel piling

Subject	Nonmetallic Mineral Resources
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-08-02

USGS Aero-magnetic survey

Subject	Airborne Surveys
Creator	Geyer, Alan R.
Date	1957

USGS DC-3 Airborne magnetometer "bird"

Subject	Airborne Surveys
Creator	Geyer, Alan R.
Date	1957

USGS DC-3 Airborne Scintillometer

Subject	Airborne Surveys
Creator	Geyer, Alan R.
Date	1957

USGS DC-3 magnetometer recording charts

Subject	Airborne Surveys
Creator	Geyer, Alan R.
Date	1957

USGS in Montana

Subject	Miscellaneous
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1907

U.S. Gypsum Company plant from east

Subject	Nonmetallic Mineral Resources
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1923-08-23

U.S. Gypsum Company quarry

Subject	Nonmetallic Mineral Resources
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1923-08-23

U.S. Gypsum Company quarry from west side

Subject	Nonmetallic Mineral Resources
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1923-08-23

U. S. Mail plane being serviced for flight west

Subject	Miscellaneous
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-08-09

Valley and plateau, looking east

Subject	Geomorphology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-09-28

Valley and Ridge Physiographic Province

Subject	Geomorphology
Creator	Geyer, Alan R.
Date	1971-08-12

Valley between Middletown and Lancaster

Subject	Topography
Creator	Johnson, Meredith E., 1897-
Date	Spring 1922

Valley filled with anthracite silt

Subject	Mineral Resources-Coal
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1915

Valley filled with culm washings

Subject	Mineral Resources-Coal
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1915

Valley Forge Cement Company Quarry

Subject	Nonmetallic Mineral Resources
Creator	Graeber, Charles Karsner, 1896-
Date	1935-06-02

Valley Forge National Historical Park

Subject	State Parks
Creator	Geyer, Alan R.

Valley Forge National Historical Park

Subject	State Parks
Creator	Geyer, Alan R.
Date	1960-12

Valley in which gas wells are located

Subject	Topography
Creator	Johnson, Meredith E., 1897-
Date	1922-06-29

Valley of Breast Work Run

Subject	Topography
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1922-10-12

Valley of Chest Creek

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

Valley of Cole Creek near Coleville

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

Valley of Conewango Creek

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

Valley of Little Pine Creek

Subject	Geomorphology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1930-09-23

Valley of Lockhouse at Buttonwood

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1932-05-15

Valley of Monongahela

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

Valley of Red Bank Creek

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-08-06