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The Bear Gulch Limestone is commonly considered to be part of the Heath Formation, the youngest formation in the Big Snowy Group of central Montana. [1] [14] [2] [15] Some authors instead consider the Bear Gulch Limestone to be an early member of the Tyler Formation, a patchy but widespread unit of Carboniferous limestone and terrestrial sediments.
The Susie Mine was one of the mines in the Upper Tenmile Creek Mining Area. The Susie mine was a gold, silver, and lead mine, and has significantly high acid drainage polluted with arsenic and heavy metals. The drainage from this mine is a major source of the heavy metal contamination in streams that flow into the water sources for Helena ...
Bear Gulch Limestone: 324 Ma: Montana, US A limestone-rich geological lens in central Montana. It is renowned for its unusual and ecologically diverse fossil composition of chondrichthyans, the group of cartilaginous fish containing modern sharks, rays, and chimaeras.
In First Chance Gulch in western Montana, the town is located 11 miles up the Garnet Range Road, in mountains and forest. The town is at approximately 6,000 feet (1,800 m) elevation. The nearest city is Missoula , approximately 20 miles (32 km) to the west.
It is known from the Serpukhovian-aged lagerstätte of the Bear Gulch Limestone of Montana, United States. It is one of the genera included in the family Gregoriidae . [ 3 ] [ 4 ]
Hydraulic gold mining in Alder Gulch, 1871. Photo by William Henry Jackson. Placer mining in Alder Gulch, 1872. Alder Gulch (alternatively called Alder Creek) is a place in the Ruby River valley, in the U.S. state of Montana, where gold was discovered on May 26, 1863, by William Fairweather and a group of men including Barney Hughes, Thomas Cover, Henry Rodgers, Henry Edgar and Bill Sweeney ...
Dustin Kjersem’s battered body was discovered October 12 in a tent near Big Sky, Montana. A 911 caller said it looked like a bear attack. But police now suspect Kjersem was murdered.
The bear gulch limestone is a fossil deposit from the Big Snowy Mountains of Montana. It is a smaller part of the larger St. louis limestone, which dates to the middle carboniferous. During the time, the area was a series of mudflats and lagoons with brackish and freshwater. [7] Many theories have been put forth for the preservation.