Contact at Grand Marais, Minnesota
Steven Dutch, Professor Emeritus, Natural and Applied Sciences, Universityof Wisconsin - Green Bay
 |
A spectacular contact between Keeweenawan volcanic rocks and interflow
sediments is exposed in a road cut just southwest of Grand Marais, Minnesota. In addition to the contact itself, there are two spectacular squeezeups of sediment (apparently still soft when the flows were erupted. |
 |
Left and below: the upper (western) squeezeup |
 |
 |
 |
Left and below: the lower (eastern) squeezeup. In both cases, the directions of folding and thrusting suggest flow from northeast to southwest. |
 |
 |
Return to Historic Sites Index
Return to Virtual FieldTrips Index
Return to Professor Dutch's Home Page
Created 20 August 2007, Last Update 07 June 2020