 | | Report (issue) | | Bentonite Deposits of the Northern Black Hills District Wyoming, Montana, and South Dakota By MAXWELL...investigation of the district that has supplied most of the gel-forming sodiumtype bentonite produced to date...group_______---_-__-_--_-__--_-__--_-_-__--____ Belle Fourche shale_______ . -__.____--____ Lower member....structure_________________________________________________ Bentonite deposits..____-________-_____----___---_-___-____...935 936 937 937 942 950 952 952 IV CONTENTS Bentonite deposits Continued Properties related to use as |  | Hill, Thelma P., Werner, Marian A., Horton, M. Julia (1967) Chemical composition of sedimentary rocks in Colorado, Kansas, Montana, Nebraska, North Dakota, South Dakota, and Wyoming. Professional Paper 561. US Geological Survey doi:10.3133/pp561 | Report (issue) | | Colorado, Kansas, Montana Nebraska, North Dakota South Dakota, and Wyoming GEOLOGICAL SURVEY PROFESSIONAL...Colorado, Kansas, Montana Nebraska, North Dakota South Dakota, and Wyoming Compiled by THELMA P. HILL...and mixed-rock categories. 2. Group B, clay and bentonite, shale, and volcanic ash, common- and mixed-rock...samples from Colorado, Kansas, Montana, Nebraska, South Dakota, and Wyoming, containing more than 75 percent...Dakota___________________________________________________ 6. South Dakota and Wyoming..___________________--_________ |
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