Coal bed A, the base of the Tullock member of the Lance formation. Treasure County, Montana. 1912.
Dates
Date Taken
1912
Summary
Coal bed A, the base of the Tullock member of the Lance formation, exposed near head of unknown creek in Sec. 34, T. 5 N., R. 35 E. The manner in which the heavy sandstone bed overlying the coal to the right is partly replaced by thin-bedded sandstone and shale within a short distance well illustrates the irregularities in stratification characteristic of the Lance formation. Treasure County, Montana. 1912. Published as Plate 9-A in U.S. Geological Survey Bulletin 749. 1923.
Summary
Coal bed A, the base of the Tullock member of the Lance formation, exposed near head of unknown creek in Sec. 34, T. 5 N., R. 35 E. The manner in which the heavy sandstone bed overlying the coal to the right is partly replaced by thin-bedded sandstone and shale within a short distance well illustrates the irregularities in stratification characteristic of the Lance formation. Treasure County, Montana. 1912. Published as Plate 9-A in U.S. Geological Survey Bulletin 749. 1923.
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