Exit at Velp Avenue and head west. Cross Duck Creek, turn right on County J, then left at the River Bend Supper Club. Continue straight west to the large quarry. This exposure of Ordovician-age bedrock is the Galena dolomite. We do not enter the Duck Creek Quarry, but observe from a vantage point on the edge.
Water seeping out of the rocks shows the movement of groundwater in the area.
Note that many seeps originate about 5 meters below the lip of the quarry at the base of one particularly thick layer. The quarry would fill with water if it were not pumped. A pipe runs up the right side of the quarry to carry pumped water. A nice example of microclimate. Dandelions are growing on the sunny south slope of the berm but not the shadier north slope.