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Breakwaters redstone11/14/2022 The Jacobsville reflects the sandstones described as either lower red or Eastern. Seaman, in which the various Lake Superior sandstones were divided into the Jacobsville, Freda, and Munising. The current definition for the Jacobsville Formation was made in 1907 by A. Differentiation of the sandstone largely centered on an east-west division across the Keweenaw Peninsula or between the lower red and upper grey sandstones. Many studies used the term Lake Superior Sandstone to describe a number of different geologic formations. The earliest geologic studies of southern Lake Superior were made in the early 1800s. The sandstone was deposited within terrestrial fluvial environments early in the Neoproterozoic Era. In 1907, the Jacobsville Formation was given its current classification and the name Jacobsville, in honor of Jacobsville, Michigan, a town known for its production of the sandstone. The sandstone has been variously called redstone, brownstone, Lake Superior Sandstone, and Eastern Sandstone. The stone was extracted by thirty-two quarries throughout the Upper Peninsula of Michigan approximately between 18. Desired for its durability and aesthetics, the sandstone was used as an architectural building stone in both Canada and the United States. 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. Sample of Jacobsville Sandstone from Jacobsville, Michigan, in the A.E.
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