Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 243, part 1
Sedimentology and Ichnology of Paleozoic Estuarine and Shoreface Reservoirs, Morrow Sandstone, Lower Pennsylvanian of Southwest Kansas, USA

Fig. 54. Facies N. Intensely biotrubated siltstone with highly compressed Thalassinoides cross-cutting a background ichnofabric of Phycosiphon and Chondrites (Nell).