Pennsylvania Geological Survey - Historical Photographs

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  • Date = 1972-09-21

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This collection includes photographs from the Pennsylvania Geological Survey Historical Photographs Collection.
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Antiformal fold defined by graywacke bed, Martinsburg Formation
Antiformal fold defined by graywacke bed, Martinsburg Formation
Structure
Antiformal fold defined by graywacke bed, Martinsburg Formation. Enola, Pa.
Autochthonous basal limestones of the Martinsburg Formation
Autochthonous basal limestones of the Martinsburg Formation
Structure
Autochthonous basal limestones of the Martinsburg Formation. Beds are in a series of isoclinal folds; pen is in the hinge of a syncline. At Sporting Hill Road along Conodoguinet Creek
Bedding/transport surface
Bedding/transport surface
Structure
Bedding/transport surface
Box fold, developed above a thrust in Martinsburg
Box fold, developed above a thrust in Martinsburg
Structure
Box fold, developed above a thrust in Martinsburg. Penn Central Railroad, cuts at Enola, East Pennsboro Township
Detrital character of Rockdale Run Formation
Detrital character of Rockdale Run Formation
Stratigraphy
Detrital character of Rockdale Run Formation, located near township school
Dolomite beds, boudinaged
Dolomite beds, boudinaged
Structure
Dolomite beds, boudinaged
Dolomite beds, boudinaged
Dolomite beds, boudinaged
Structure
Dolomite beds, boudinaged
Epler/Myerstown with S0 all in S1
Epler/Myerstown with S0 all in S1
Structure
Epler/Myerstown with S0 all in S1. Crinoids extended parallel to lineations on S1. Upper Allen Township
Epler/Myerstown with S0 all in S1
Epler/Myerstown with S0 all in S1
Structure
Epler/Myerstown with S0 all in S1, Upper Allen Township
Fold noses with limbs sheared out
Fold noses with limbs sheared out
Structure-Folds
Fold noses with limbs sheared out, Martinsburg graywackes
Isoclinal fold, syngenetic folds reclined
Isoclinal fold, syngenetic folds reclined
Structure
Isoclinal fold, syngenetic folds reclined, St. Paul Group. Hempt Quarry
Isoclinal folds in basal Martinsburg Formation
Isoclinal folds in basal Martinsburg Formation
Structure
Isoclinal folds in basal Martinsburg Formation. Entrance to Indian Creek Housing development along Conodoguinet Creek. Sporting Hill Road, one mile northeast of Naval Supply Depot
Isoclinal syngenetic reclined fold, view down hinge
Isoclinal syngenetic reclined fold, view down hinge
Structure
Isoclinal syngenetic reclined fold, view down hinge, St. Paul Group. Hempt Quarry
Isoclinal syngenetic reclined folds
Isoclinal syngenetic reclined folds
Structure
Isoclinal syngenetic reclined folds, cleavage close to bedding and probably St. Paul Group. Hempt Brothers Quarry, Cedar Cliff area, Harrisburg West area
Kink bands on S1/S3 cleavage, Martinsburg Formation
Kink bands on S1/S3 cleavage, Martinsburg Formation
Structure-Kink Bands
Kink bands on S1/S3 cleavage, Martinsburg Formation, along Yellow Breeches Creek
Kink folds and gash fracture en-echelon, Epler Formation
Kink folds and gash fracture en-echelon, Epler Formation
Structure-Kink Bands
Kink folds and gash fracture en-echelon, Epler Formation. Small quarry across from main Pennsy Supply Quarry, Bowmansdale, Upper Allen Township
Martinsburg Formation
Martinsburg Formation
Stratigraphy
Martinsburg Formation, allochthonous limestone conglomerate with quartz sand/calcite matrix
Martinsburg Formation allochthonous red beds
Martinsburg Formation allochthonous red beds
Stratigraphy
Martinsburg Formation allochthonous red beds, East Pennsboro Township
Martinsburg Formation limestone conglomerate, allochthonous
Martinsburg Formation limestone conglomerate, allochthonous
Stratigraphy
Martinsburg Formation limestone conglomerate, allochthonous. Penn Central Railroad cuts at Enola, East Pennsboro Township
Martinsburg Formation, platy argillaceous limestones, allochthonous
Martinsburg Formation, platy argillaceous limestones, allochthonous
Stratigraphy
Martinsburg Formation, platy argillaceous limestones, allochthonous. Enola, Pa.