Sections of Green River formation-Continued. East side of Hill Creek, sec. 7, T. 13 S., R. 20 E. Shale, lean to barren (estimated).. Shale, lean to barren (estimated). Shale, lean, grading to shale sandy, Shale, black, rich (sample 153; 20 gallons).. Shale, lean.. Shale, brown, lean.. 0023 00 Shale, lean with some rich beds (esti- Sandstone... Shale, lean with thin beds of rich Sandstone, yellow, massive. Shale, rich (sample 162; 31 gal- Sandstone, green.. 0 20 6 0 Shale, lean... 248 30 Shale, lean.. Shale, rich.... Sandstone, yellow 1... 20080 1 500+ 1 75 Sections of Green River formation-Continued. North side of Avintaquin Creek, sec. 26, T. 6 S., R. 8 W. Shale and sandstone to top of hill; upper Shale and sandstone.. Ft. in. Kyune Canyon, 4 miles northwest of Colton, about sec. 17, T. 11 S., R. 9 E. (lower shale zone). BRIDGER AND UINTA FORMATIONS. The somber-colored clay shales and coarse sandstones that occupy the interior of the Uinta Basin have been subdivided into two formations-the Bridger and Uinta-on the basis of their fossils. Along the southern margin of the basin the older of the two (the Bridger) rests on the Green River formation without angular unconformity, but along the north side of the basin it overlaps older formations, entirely obscuring the Green River and in most places covering the outcrop of the Wasatch beds. So far as known neither of these formations includes bituminous beds, either oil shale or saturated sandstones. The southern limit of the Bridger formation was observed at several places during the field work, and the approximate limit of that formation is shown on the map (Pl. XII, in pocket). in GEOLOGIC STRUCTURE. The Uinta Basin is a broad, shallow syncline whose axis trends a general easterly direction and lies near the north side. The beds |