Trace fossils from the Lower Harding Formation (Middle Ordovician), Colorado

A unique assemblage of trace fossils from the lower Harding Formation in Fremont County, Colorado IS briefly described and the occurrence and distribution of 23 forms in three facies of an alluvial channel-estuarine envrronment of deposition is illustrated. lchnogenera described andlor figured include Arenicolites, Asaphoidichnus, Buthotrephis, Chondrites, Corophioides, Monocraterion, Rhizocorallium, Rusophycus, Teichichnus, and Zoophycus