Fox Hills - Lower Hell Creek, Powder River Basin

Comments on Geologic Parameters

5 Percent Shale:

Percent shale of the Fox Hills Sandstone is directly inferred from the percent-sandstone map of Lewis and Hotchkiss (1981). Greatest percent-shale values occur in the south part of the basin.

5 Map:


5 Reference:

Lewis, B. D., and Hotchkiss, W. R., 1981, Thickness, percent sand, and configuration of shallow hydrogeologic units in the Powder River Basin, Montana and Wyoming: U. S. Geological Survey, Miscellaneous Investigations Series, Map I-1317, 6 sheets.