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Jacobsville Sandstone is a red sandstone formation, marked with light-colored streaks and spots, primarily found in northern Upper Michigan, portions of Ontario, and under much of Lake Superior. Desired for its durability and aesthetics, the sandstone was used as an architectural building stone in both Canada and the United States.
The colors in the cliffs are created by the large amounts of minerals in the rock. The cliffs are composed of the Munising Formation of 500-million-year-old Cambrian Period sandstone. The Munising Formation sits atop Precambrian sandstone of the Jacobsville Formation. The mottled red Jacobsville Formation is the oldest rock in the park.
John Henry Jacobs (April 18, 1847 – 1934) was a pioneer of the sandstone industry in the Upper Peninsula of Michigan, [1] particularly of Jacobsville Sandstone. He owned and operated a number of sandstone quarries. [2] He was born in Lorain County, Ohio, on April 18, 1847. [3]
The Munising Group or Formation is a 1,700 feet (520 m) thick, white to light grey [1] Cambrian sedimentary unit that crops out in Michigan and (to a lesser extent) Ontario.
From approximately 1870 to 1915, about 32 quarries mined Jacobsville Sandstone in the Upper Peninsula, particularly near Marquette and the community of Jacobsville. The sandstone was used in many buildings, both locally and around the United States. [64] Since logging of white pine began in the 1880s, timber has been an important industry. [65]
The Munising Group or Formation is a 1,700 feet (520 m) thick, white to light grey [1] Cambrian sedimentary unit that crops out in Michigan and (to a lesser extent) Ontario. At one end of its extent, it comprises a basal conglomerate overlain by the Chapel Rock Member and the Miners Castle Member; elsewhere, it comprises the Eau Claire ...
Jacobsville is an unincorporated community on the south side of the Keweenaw Peninsula near the outlet of the Keweenaw Waterway at [ 5 ] [ 9 ] It is the site of sandstone quarries that are now shut down but formerly supplied red sandstone for buildings throughout North America and Europe .
Google Maps' satellite view is a "top-down" or bird's-eye view; most of the high-resolution imagery of cities is aerial photography taken from aircraft flying at 800 to 1,500 feet (240 to 460 m), while most other imagery is from satellites. [5]