Geology Picture Gallery

Located near Rock Springs, WI, on the north side of the Baraboo Range is Van Hise Rock. It is an isolated section of Precambrian bedrock, still attached to the Earth's crust. The two layers are a pink, metamorphic quartzite and phyllite. The layers of Van Hise Rock were tilted into an near-vertical position by compressive forces that occured during the uplift of the Penokean Mountain. Also visible on the Van Hise Rock are important telltale "slaty cleavage" marks. They show how the compressional stresses were refracted through the two different rock types present here.

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Dr. Alan Whittington on the bank of the Vermillion River as it cuts through Mattheison State Park. Behind him is an outcrop of limestone that is part of the Galena-Plaittville Formation.

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A very nice gneiss. This bit of metamorphic rock is located near the Great Salt Lake in Utah.

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Devil's Tower in Wyoming... Click here for more information on the formation of Devil's Tower.

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On the left, folded beds of the Lower Ophir Formation, a phyllitic shale with a rock hammer for scale. On the right, intruded beds of phyllitic shale from the Upper Ophir Formation. These outcrops are located in Albion Basin in Utah.

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Crossbeds in a course-grained Frontier Formation sandstone from South Fork in Utah.

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And example of graded bedding. The large grains were the first to be deposited. The fine grains were the last. Gradded bedding allows geolgists to determine the younging direction of a rock.

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Matt Wortel standing in front of some freakishly huge ripple marks at Pine Creek in Utah.