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

1,600 foot peneplane

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

520 foot level bench

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

770 foot terrace of Allegheny River gravel

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

Abandoned river gap southeast of Williamsport

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

Across Susquehanna Valley, south of Athens

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

Allegheny Mountain and Deeters Gap

Subject	Geomorphology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1935-11-02

An abandoned lumber camp

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

Beach and wave studies

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

Beach and wave studies

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

Beach and wave studies

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

Benched cut along Interstate 80

Subject	Geomorphology
Creator	Geyer, Alan R.
Date	1970-10

Broad flat at head of branch of Huntington Creek

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1930-07-18

Campbell Ledge near Pittston

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1931

Campbell's Ledge from west banks

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1932-05-13

Catskill Summit

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1937-08-14

Character of upland near head of Bully Hollow

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

Chestnut Ridge near Fairchance

Subject	Geomorphology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1928-06-15

Cliff from bridge at Leechburg

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1927-07-11

Crooked Creek Valley

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1937-06

Curtin Gap

Subject	Geomorphology
Creator	Bolles, William H.
Date	1970-07

Delaware Water Gap

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-07-18

Delaware Water Gap

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-07-17

Delaware Water Gap from Godfrey's Ridge

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

Delaware Water Gap, New Jersey side

Subject	Geomorphology
Creator	Bolles, William H.
Date	1970-04

Delaware Water Gap, New Jersey side

Subject	Geomorphology
Creator	Bolles, William H.
Date	1970-04-07

Dip slope into creek

Subject	Geomorphology
Creator	Bolles, William H.
Date	1970-04

Dissected plateau in baked shales near trap dike

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1928-05-01

Divide between Crooked Creek and Marsh Creek

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1937-08

Dry playa

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

Elk Mountains

Subject	Geomorphology
Creator	Willard, Bradford, 1894-
Date	1931-08-01

Falls in Elklick Creek

Subject	Geomorphology
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1935-05-23

Flat crested across Cowanesque Creek

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

Fort Necessity

Subject	Geomorphology
Creator	Willard, Bradford, 1894-
Date	1933-08-01

Fort Necessity

Subject	Geomorphology
Creator	Willard, Bradford, 1894-
Date	1933-08-01

From hill a few miles west of Wellsboro

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

From top of hill at south end of Port Trevorton looking east

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

Gap of Second Mountain

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

Gap through Bald Eagle Mountain

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1931-05

Girty's Face

Subject	Geomorphology
Creator	Willard, Bradford, 1894-
Date	1930-11-01

Glen in Delaware Water Gap

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-07-18

Glen in Delaware Water Gap

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-07-18

Gorge of Conemaugh River through Chestnut Ridge

Subject	Geomorphology
Creator	Shaffner, Marchant N. (Marchant Nissley), 1897-1990
Date	1950

Gorge of Conemaugh River through Laurel Hill

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1939-10-12

Gorge of Conemaugh through Laurel Hill

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1939-10-12

Kittatinny Mountain showing bench at top of Tuscarora sandstone

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-02-05

Kittatinny Mountain showing bench at top of Tuscarora sandstone

Subject	Geomorphology
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-02-05

Kittatinny peneplane

Subject	Geomorphology
Creator	Willard, Bradford, 1894-
Date	1929

Leached limestone

Subject	Geomorphology
Creator	Geyer, Alan R.
Date	1968

Leached limestone in background

Subject	Geomorphology
Creator	Geyer, Alan R.
Date	1968

Leached limestone in foreground

Subject	Geomorphology
Creator	Geyer, Alan R.
Date	1968