The data displayed below were collected during a joint project between the following departments at Montana Tech of The University of Montana: Geophysical Engineering and the Montana Bureau of Mines and Geology. The samples represent sandstones collected and analyzed for their potential use as proppant material.
|Mertie, J.B., 1951, Geology of the Canyon Ferry quadrangle, Montana: U.S. Geological Survey Bulletin 972, 95 p.
|Reference does not contain any measured sections but describes the Flathead and the Quadrant Formations. Flathead (p. 21): brittle unit displaced by numerous small cross faults producing step-like outcrops. NW of Hellgate Gulch the Flathead is tightly folded and bent with little evidence of rupturing. It contains mostly medium to coarse quartzite grains and mostly pale gray with occasional purple and red banding. Quadrant Formation (p.28): Exposed along the front of the Big Belt Mountains in the vicinity of White Gulch and at places in the southeastern part of Spokane Hills. This formation consists of quartzite interbedded with limestone, sandstone, and shale. The quartzite is hard, tough, brittle and vitreous.The sandstone is thin-bedded and brown, red, or gray; most is soft and shaly, but some is quartzitic and other is calcareous.