Scratch circles: A new specimen from a lake-margin deposit of the passaic formation (Upper Triassic), Douglassville, Pennsylvania

Document Type

Article

Publication Date

12-1-1999

Abstract

A new occurrence of ancient scratch circles is documented from an Upper Triassic lake-margin deposit at Douglassville, Pennsylvania. Three partial scratch circles encompass a filled tube inferred to have been occupied by a plant stem. Water currents, via a sediment laden stream, likely shook the plant stem while the leaves were whirled around to create partial scratch circles. Sediment infilling followed by desiccation accounts for the preservation.

Publication Title

Northeastern Geology and Environmental Sciences

First Page Number

179

Last Page Number

180

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