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Ichnos
An International Journal for Plant and Animal Traces
Volume 1, 1991 - Issue 3
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Short communications

Ichnologic note

Scratch circles from the Towaco Formation (Lower Jurassic), Riker Hill, Roseland, New Jersey

Pages 233-235 | Published online: 17 Dec 2008
 

Abstract

Scratchings, forming two partial scratch circles, surround a narrow, filled tube probably formed by a plant stem. The scratchings are interpreted to have formed as follows: Water currents carrying sediment onto a floodplain swirled around the plant leaves, etching out partial scratch circles on the sediment surface. Later settling of the finest material resulted in a veneer of mud filling the scratch circles. Drag marks on the bedding surface were formed by the same processes. Later drying of the mud resulted in the formation of desiccation cracks.

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