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

Double folding in Helderberg limestone

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-09

Drag fold in Conestoga limestone along Route 72 at Lynden

Subject	Structure-Folds
Creator	Geyer, Alan R.
Date	1960

Drag folds in Pocono sandstone

Subject	Structure-Folds
Creator	Shaffner, Marchant N. (Marchant Nissley), 1897-1990
Date	1952

Effect of structure on topography

Subject	Structure-Folds
Creator	Johnson, Meredith E., 1897-
Date	1921-10-15

Fairly symmetrical syncline in Salina rocks

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-08-16

Faulted fold

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-07-31

Folded and faulted strata

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

Folded rocks

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1915

Folded Silurian strata east of Mifflin

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

Folded Silurian strata east of Mifflin

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

Folded strata

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

Folded strata

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

Folded strata

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

Folded strata

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

Folded strata in Silurian

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

Folding along Middle Juniata Valley

Subject	Structure-Folds
Creator	Willard, Bradford, 1894-
Date	1929

Fold in Trimmers Rock (?)

Subject	Structure-Folds
Creator	Moseley, John Reed

Fold noses with limbs sheared out

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

Fold section

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-08-16

Folds in Brallier shale

Subject	Structure-Folds
Creator	Moseley, John Reed

Folds in limestone of St. Paul Group

Subject	Structure-Folds
Creator	Inners, Jon D.
Date	1974-06-11

Folds on Juniata River

Subject	Structure-Folds
Creator	Willard, Bradford, 1894-
Date	1931-07-01

Helderberg limestone, folded

Subject	Structure-Folds
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date	1933-09-26

Hill opposite Lock Haven showing dipping Middle Devonian strata

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

Horizontal folds, Buffalo Springs Formation

Subject	Structure-Folds
Creator	Geyer, Alan R.
Date	1961-02

Inclined Salina rocks

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-08-16

Local fold and small fault (on left) in Conemaugh (?) sandstone

Subject	Structure-Folds
Creator	Johnson, Meredith E., 1897-
Date	1921

Local fold and small fault (on left) in Conemaugh (?) sandstone

Subject	Structure-Folds
Creator	Johnson, Meredith E., 1897-
Date	1921

Losh's Run

Subject	Structure-Folds
Creator	Horich, Franklin J. W.
Date	1921-10-30

Minor anticline in Martinsburg shale close to contact with Medina

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

Minor fold in quartzite bed of Peters Creek Formation

Subject	Structure-Folds
Creator	Inners, Jon D.
Date	1972-12

Minor folds in Cambrian limestone

Subject	Structure-Folds
Creator	Geyer, Alan R.
Date	1956

More distant view than negative no. 1255 of Medina and minor anticline in Martinsburg shale

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

Nearly vertical bedding in Rodman limestone

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1925-07-15

Nearly vertical strata

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

Non-symmetrical sharp anticline

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1921-08-16

Overturned anticline at Cornwall Railroad cut

Subject	Structure-Folds
Creator	Geyer, Alan R.
Date	1963

Overturned folds, Annville Quarry

Subject	Structure-Folds
Creator	Geyer, Alan R.
Date	1956

Overturned folds, Eshelman's Quarry

Subject	Structure-Folds
Creator	Geyer, Alan R.
Date	1961-04-14

Overturned strata

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-07-31

Overturned strata

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1924-07-31

Quarry in Helderberg limestone

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-09

Quarry in Helderberg limestone

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-09

Quarry in Helderberg limestone

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1933-09

Quarry operated by State Highway Department (Helderberg limestone)

Subject	Structure-Folds
Creator	Stone, Ralph W. (Ralph Walter), 1876-1964
Date

Ravine showing sharp fold

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

Recumbent anticline in cement limestone quarry

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1932-05-29

Recumbent anticline in cement limestone quarry

Subject	Structure-Folds
Creator	Ashley, Geo. H. (George Hall), 1866-1951
Date	1932-05-29

Rock structure

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

Rock structure

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