American South USA
Geological Time: Carboniferous Mississippian
Salem Limestone
the raw material is provided by
The identification is based upon:
Cummings, E.R., Branson, E.B., Beede, J.W.,and Smith, E.A., 1905: Fauna of the Salem Limestone of Indiana. Indiana Department of Geology and Natural Resources, Thirtieth Annual Report, pp. 1187-1394. Plate p. 1201-1202, Fig.