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1,600 foot peneplane

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

1935 Field Conference of Pennsylvania Geologists

Subject	Field Conferences and Other Meetings
Creator	Willard, Bradford, 1894-
Date	1935-06-02

#4 Hoist house

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

520 foot level bench

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-07-21

520 foot terrace and (shoveline?)

Subject	Topography
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1925-07-14

770 foot terrace of Allegheny River gravel

Subject	Geomorphology
Creator	Johnson, Meredith E., 1897-
Date	1926-05-21

90 foot derrick at No. 3 well of Peoples Natural Gas (P.N.G.) Company

Subject	Oil and Gas
Creator	Johnson, Meredith E., 1897-
Date

Abandoned coke ovens

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

Abandoned furnace of Lebanon city water supply reservoir

Subject	Nonmetallic Mineral Resources

Abandoned iron mine in "Big Hill" Cornwall

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

Abandoned oil well on Jones Farm

Subject	Oil and Gas
Creator	Johnson, Meredith E., 1897-
Date	1923-05-03

Abandoned pumper (oil well)

Subject	Oil and Gas
Creator	Johnson, Meredith E., 1897-
Date	1923-04-27

Abandoned pumping wells

Subject	Oil and Gas
Creator	Johnson, Meredith E., 1897-
Date	1923-04-26

Abandoned quarry in folded Helderberg limestone

Subject	Structure-Folds
Creator	Willard, Bradford, 1894-
Date	1934-09-26

Abandoned quarry in folded Helderberg limestone

Subject	Structure-Folds
Creator	Willard, Bradford, 1894-
Date	1934-09-26

Abandoned quarry in Morgantown sandstone

Subject	Stratigraphy
Creator	Hickok, W. O. (William Orville), 1905-
Date	1934-06-01

Abandoned river gap southeast of Williamsport

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1934-06-14

Abandoned sandstone dimension quarry

Subject	Nonmetallic Mineral Resources
Creator	Bolles, William H.
Date	1972-11-09

Abandoned sandstone dimension quarry

Subject	Nonmetallic Mineral Resources
Creator	Bolles, William H.
Date	1972-11-09

Abandoned sandstone quarry

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

Abandoned tanning plant

Subject	Miscellaneous
Creator	Johnson, Meredith E., 1897-
Date	1925-05-25

A bit of primeval forest

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

A bit of Red Arrow Trail

Subject	Miscellaneous
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1929-07-29

Abutment of abandoned railroad bridge

Subject	Nonmetallic Mineral Resources

Abutment of bridge built of local sandstone

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

Abutment of railroad bridge (abandoned)

Subject	Nonmetallic Mineral Resources
Creator	Moseley, John Reed
Date	1950-08

Academy of Science

Subject	Miscellaneous
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-08-01

Accumulation of silt in Mahanoy Creek

Subject	Mineral Resources-Coal
Creator	Fraser, Thomas
Date	Summer 1926

Acid mine drainage from reclaimed strip pit prior to 1965 Backfilling Law

Subject	Environmental Geology
Creator	Bolles, William H.
Date

"A" coal exposed at entry of mine

Subject	Mineral Resources-Coal
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1940-10-18

A coal horizon (Brush Creek) without coal (opposite neck)

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

A corner in quarry to show structure

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

Acre Rocks on east slope of Big Savage Mountain

Subject	Stratigraphy
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1935-09-23

Across early Monongahela Channel of early glacial age

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

Across early Monongahela Channel of early glacial age

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

Across early Monongahela Channel of early glacial age

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

Across early Monongahela Channel of early glacial age

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

Across French Creek at Franklin

Subject	Stratigraphy
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1941-08

Across Susquehanna at gap of Second Mountain

Subject	Surface Water
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1931-08-01

Across Susquehanna Gap in Second Mountain

Subject	Surface Water
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1931-08-01

Across Susquehanna Valley, south of Athens

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1934-06-14

Across valley of East Branch of Tuncangwant Creek

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

Active quarry

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

Adams Memorial Chapel

Subject	Cities, Towns, and Buildings
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1928-10-05

Adams Memorial Chapel

Subject	Cities, Towns, and Buildings
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1928-10-05

Adjusting helmet

Subject	Field Conferences and Other Meetings
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1915

After blast in Triassic sediments to widen curve in highway

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

Air pump with old bull wheel in background

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

Albion Quarry

Subject	Nonmetallic Mineral Resources
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-08-01

Albion Quarry

Subject	Nonmetallic Mineral Resources
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-08-01