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

Area showing erosion of outlet waters

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-08-07

Bald Eagle Valley

Subject	Glacial Geology
Creator	Moyer, Forrest Theodore, 1906-

Bald Eagle Valley

Subject	Glacial Geology
Creator	Moyer, Forrest Theodore, 1906-

Bed of Lake Cowanesque at Elkland

Subject	Glacial Geology
Creator	Willard, Bradford, 1894-
Date	1931-08-01

Bench at top of gravel deposit 1380' (200' above river), Illinoian age

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-09-01

Bill Hess Creek

Subject	Glacial Geology
Creator	Willard, Bradford, 1894-
Date	1931-08-01

Boulder from drift

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-08-03

Boulder from drift

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-08-03

Boulder near observatory

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

Closer view of the valley wall of drift of Middle Branch of Little Neshannock Creek

Subject	Glacial Geology
Creator	Graeber, Charles Karsner, 1896-
Date	1934-08-14

Coastal ranges, approximately 100 miles northwest of Juneau, Alaska

Subject	Glacial Geology
Creator	Socolow, Arthur A.
Date	1952

Culls at moraine at Russell

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

Cut, for big water main, showing cobbles in gravel, all resting on Martinsburg shale

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

Cut in shore cliff

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-07-30

Cut in shore cliff

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-07-30

Dam and bridge made of glacial boulders

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1922-08-09

Deer Leap Falls, Childs Park, Dingman Creek

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1922-08-09

Detail of cliff

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

Detail of glacial gravel

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-10-11

Detail of glacial hill, cut by road

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1931-02-24

Detail of sand bank

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

Details in gravel pit near Dickville

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

Distorted sand layers

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-08-03

Disturbed morraine in foreground, Kame farther back, Bald Mountains in background.

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

Drainless basin mantled with Illinoian till

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1934-08

Drainless basin mantled with Illinoian till

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1934-08

Drift escarpment

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-07-30

Early glacial deposit

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

Early glacial deposit just off from Susquehanna Trail

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926

Early glacial deposit just off from Susquehanna Trail

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926

Gaines spillway

Subject	Glacial Geology
Creator	Willard, Bradford, 1894-
Date	1931-08-01

Glacial boulders, mostly sandstone

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1927-09-24

Glacial deposit on Highway Route No. 2

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1927-09-28

Glacial drift

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-04-01

Glacial drift overlying slate pit

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1925-10-14

Glacial drift over Old Bangor quarry

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-04-01

Glacial drift over slate quarry

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1923-07-19

Glacial drift over slate quarry

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1923-07-19

Glacial gravel

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-09-01

Glacial gravel beside highway

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1922-10-11

Glacial gravel overlying slate quarry

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1925-10-15

Glacial gravel pit

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-09-01

Glacial gravel pit

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-09-01

Glacial gravel pit and bench

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-09-01

Glacial gravel pit and bench above hill east of east part of Warren

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1926-09-01

Glacial gravels

Subject	Glacial Geology
Creator	Geyer, Alan R.
Date	1970-07

Glacial grooves at silica sand quarry

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

Glacial grooves (east-west) on sandstone

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1924-08-18

Glacial hill cut through by road

Subject	Glacial Geology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1931-02-24

Glacial lake bench and floor Route 20

Subject	Glacial Geology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-10-01