Penokean Orogeny  search
BTChronostratigraphic Units
 .Precambrian
 ..Penokean Orogeny
RTMesoproterozoic
 orogeny
 Minnesota
 Michigan
 Hudsonian Orogeny
SNA time of deformation and granite emplacement during the Precambrian. Before 1978, also search Penokean AND orogeny. Indexed with age as applicable.