Trace Fossils

                                                                        Rosellia
This picture is taken in summer 2011 at the highway 24 road cut of  Ferron Sandstone at Steamboat. Rosellia is commonly cylindrical, inclined burrow with an funnel shape opening. It is considered to be associated with proximal Cruziana ichnofacies.

                                                              Chondrites
Chondrites are root-like burrow system of regularly branching feeding tunnels of uniform diameter which never anastamose, interpenetrate, nor cut across on another. It is suggested they are feeding burrows and are common element of the Cruziana ichonfacies.

                                                                 Rhizocorallium
Rhizocorallium are straight to sinuous, horizontal, U-shaped spreiten-burrows. Dwelling/feeding burrows of a deposit feeder. It is believed to be associated with distal Cruziana ichonfacies.

                                                                  Thalassinoides
Thalassinoides are commonly smooth-walled, unlined horizontal burrows. Branches are Y to T shaped. It is interpreted as dwelling/feeding burrow of a deposit feeding crustacean asssociated with the Cruziana ichonfacies.

                                                                     Skolithos
Single entrance, cylindrical to subcylindrical, straight to curved, vertial to subvertical, unbranched burrow. Dwelling burrows of suspensin-feedign organism. It is an element of the Skolithos ichnofacies.


                                                                      Teredolites

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