Racine Dolomite  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Middle Silurian
 .....Niagaran
 ......Racine Dolomite
RTIllinois
 Wisconsin
 Michigan
SNNE Illinois, N Michigan and SE Wisconsin. Added to Thesaurus in 1989.