Metadiabase

Variably metamorphosed dikes, sills and subconcordant sheets of diabasic rocks. Probably coeval (in part) with volcanic rocks of Hemlock Formation (unit Xh).
State Wisconsin
Name Metadiabase
Geologic age Early Proterozoic
Lithologic constituents
Major
Metamorphic > Metaigneous > Metaintrusive > Metadiabase
Comments Cannon (2004, pers. comm.) no longer believes that these metadiabase dikes are coeval with the Hemlock Formation
References
NGMDB product
Counties Bayfield