Clam Falls volcanic sequence

Clam Falls volcanic sequence (~1,102 Ma).
State Minnesota
Name Clam Falls volcanic sequence
Geologic age Mesoproterozoic
Lithologic constituents
Major
Igneous > Volcanic (Flow)
Comments Part of the St. Croix horst volcanic sequences. 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 Chisago