Description: This shapefile is a digitized isopach map of thickness of the Mt. Simon (Catacosinos and others, 1986).
Service Item Id: 659b5650a1854ce39492f0b2bc274c8c
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.