Keith Stahle '01 measures strike and dip of a duplex structure at Point Au Roche State Park, NY on Lake Champlain
This is a classical textbook locality. At Lone Rock Point, the basal part of the Lower Cambrian Dunham Dolostone (upper plate) overlies the Middle Ordovician Iberville Formation (lower plate). An estimate of the stratigraphic throw at this location is 8,850 ft. Estimates of displacement along the Champlain thrust range from 35 to 62 miles.
 The Beam,
South Hero Island, VT A massive micritic bed is cut by several thrust faults forming duplex structures at "The Beam". The sense of tectonic transport is from East to West. The relative age of the faults get younger in a consistently westward direction. |
Garett Ferguson '00 measures joint orientations at Split Rock Falls, NYZero-displacement crackle zones (ZDCZ's) consist of intensely fractured rocks which differ from faults in that they lack throughgoing shear planes or visible offsets, and from joints in having a more diverse array of fracture directions. ZDCZ's are numerous in the central Adirondacks. These outcrops demonstrate the complexity of structural relationships in the Adirondacks. In this lab, we carefully examine and describe the structures found in an outcrop and measure the attitudes of a large number of planar features at Split Rock Falls.