Diabase and ferrodiorite

Diabase and ferrodiorite. Includes the Beaver River diabase, Silver Bay (~1,096 Ma), Milepost 7, Leveaux, Shoepack Lake, Cabin Creek, and Monker Lake intrusions.
State Minnesota
Name Diabase and ferrodiorite
Geologic age Mesoproterozoic
Lithologic constituents
Major
Igneous > Hypabyssal > Mafic-hypabyssal (Diabase)
Igneous > Plutonic > Dioritic > Diorite (Diabase)ferrodiorite
Comments Part of the Beaver Bay Complex and other hypabyssal intrusions. Part of the Keweenawan Supergroup and Midcontinent Rift Intrusive Supersuite.
References

Jirsa, Mark A., Boerboom, Terrence J., Chandler, Val W., Mossler, John H., Runkel, Anthony C., and Setterholm, Dale R., 2011, S-21 Geologic Map of Minnesota-Bedrock Geology; Minnesota Geological Survey, State Map Series S-21. Scale 1:500,000.

NGMDB product
Counties Cook - Lake