Cruziana isp.
Description: Cruziana is a bilobed trail with "herringbone"
(chevron-like) ridges defining a medial groove; the bilobed character is
also a result of two parallel furrows that are, in many cases, were formed
in a fine-grained sediment and preserved as casts on the base of an overlying
bed. Ridges within the trail are scratch marks. Cruziana is interpreted
as a locomotion trace made by a trilobite or trilobite-like animal as it
crawled along a sediment surface.
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