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.