A Geoscience Digital Image Library

TitleDifferential flowage and cleavage development in limestones
DescriptionDifferential flowage and cleavage development in thinker and thinner bedded limestones. A thicker bed of marble has buckled to trap and squeeze out thinner beds of the adjacent limestone to form an expanding cone of cleavage and very small-scale folds. The tectonic transport was from right to left (S to N), with younger beds on the left. The location is part of a vast area of regional overturning and horizontal flowage in carbonate nappes of southeastern Pennsylvania. Cambrian Buffalo Spring Fm., abandoned railroad cut, 1 km north of Cornwall Iron Mines, Pennsylvania.
LithostratigraphyBuffalo Springs Formation
LocationUSA ▹ Pennsylvania. 1 km north of Cornwall Iron Mines, southeastern Pennsylvania.
PhotographerDonald Wise. 1995.
CollectionKeck Structural Geology Slide Set #DW4.
Key wordsPennsylvania, limestone, folds
Tech details543 KB. Outcrop.
GeoDIL number3078