Enigmatic sedimentary structures in the Navajo Sandstone

Cylindtrical structures found in the Navajo Sandstone were investigated. Architectural morphology (sinuosity, Y- and T-branching, spiral ramps, chambers, and bilobate tunnels) and surficial morphology (scratch marks) indicate that these structures are burrows produced by mammals or therapsids. The networks made by the branches also indicate that these structures were made by social groups of organisms. This research indicates that mammals much larger than prairie dogs were capable of living as social organisms within the soil. Research is on going.
Researchers: Riese, Hasiotis, Odier (deceased)