Note the drillhole astride the contact. The quarry is a nice place to observe small-scale brittle fracture, glacial, and aeolian features. As is typical for localities on the western margins of the Green Bay Lobe, they suggest westward movement of ice away from the lobe axis rather than southward motion. A glacially polished and striated surface. Signs of wind abrasion are common on crystalline rock outcrops in Wisconsin, but frequently not noticed.
Typical indicators are smooth, sometimes polished, but pitted surfaces.
With abundant sand, strong katabatic winds and little vegetation, Wisconsin during ice retreat was an ideal environment for wind abrasion.