Queenston Shale  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Ordovician
 ....Upper Ordovician
 .....Queenston Shale
RTOntario
 Ohio
 Pennsylvania
 New York
 Richmond Group
SNIn Richmond Group. W New York, NE Ohio, NW Pennsylvania and S Ontario. Added to Thesaurus in 1989.