Mountain Shear Zone, Wisconsin



The Mountain Shear Zone is located near the town of Mountain, Wisconsin. (HA! I bet you didn't know there was a Mountain, Wisconsin!). The shear zone formed during the Proterozoic Penokean orogeny (continental collision).



Deformed granite gneiss, the star attraction of the Mountain Shear Zone.

A basaltic dike (dark horizontal band in center of photo) intrudes the granite gneiss.

Juk likes to collect big samples!

Dan, juk, and Dyanna make and get coordinates for tracings of detailed deformation features in the rocks.

The scenery in Mountain is pretty in the fall.

Wildlife in Mountain- a porcupine.

More wildlife in Mountain- a big toad.



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