Copper Harbor Conglomerate



West of Houghton the bedrock is the great Copper Harbor Conglomerate, a massive sequence of rift filling redbeds which formed from the deeply rifted continent of Rodinia which was carried into the gaping rift valley by massive rivers and floods marked by alluvial fans.  This great formation has lots of sedimentary structures within it, including mudcracks, channels, ripple marks, mudflow lobes, crossbedding, and many more. The roadcut exposure here is excellent for seeing a lot of variability.

Sedimentary Structures

Cross bedding, Bedforms, Paleocurrents

Sedimentology Movie Downloads

Sedimentology Photos from UCDavis

Sed Structures Page from Indiana

What is a sedimentary rock?

Sedimentary Animations


Question:  Could the redbeds of the Keweenaw contain potential oil and gas resources?


Copper Harbor Conglomerate