Description: This shapefile is a digitized isopach map of thickness of the Mt. Simon (Catacosinos and others, 1986).
Service Item Id: ec74edf306174637a75903b25088aff7
Copyright Text: Catacosinos, P. A., and Daniels, P. A., Jr., 1986, Stratigraphy of middle Proterozoic to Middle Ordovician formations of the Michigan Basin, in Catacosinos, P. A., and Daniels, P. A., Jr., eds., Early sedimentary evolution of the Michigan Basin: Geological Society of America, Special Paper 256, p. 53–71.