26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 134 
Pre-Cambrian and Cambrian rocks in the lower part of the unit. Evi- 
dently, the rocks of later Paleozoic age now fringing the south side 
of the Big Horn Mountains for 3 or 4 miles both northwest and 
southeast of Clear Creek had been covered by older Tepee Trail 
strata, leaving only the Pre-Cambrian and Cambrian rocks of the 
highlands along the upper reaches of Clear Creek available for erosion. 
REFERENCES 
ANpeErsoN, C. A. 
1933. The Tuscan formation of northern California, with a discussion con- 
cerning the origin of volcanic breccias. Univ. California Publ., 
Bull. Dept. Geol. Sci., vol. 23, pp. 215-276. 
BeatH, O. A.; Hacner, A. F.; and Grpert, C. S. 
1946. Some rocks and soils of high selenium content. Geol. Surv. Wyoming 
Bull. 36, pp. 1-23. 
Brown, R. W. 
1934. Celliforma spirifir, the fossil larval chambers of mining bees. Journ. 
Washington Acad. Sci., vol. 24, pp. 532-539. 
1935. Further notes on fossil larval chambers of mining bees. Journ. Wash- 
ington Acad. Sci., vol. 25, pp. 526-528. 
Dang, C. H. 
1954. Stratigraphy and facies relationships of upper part of Green River 
formation and lower part of Uinta formation in Duchesne, Uintah, 
and Wasatch Counties, Utah. Bull. Amer. Assoc. Petrol. Geol., 
vol. 36, pp. 402-425. 
Gazin, C. Lewis. 
1956. The geology and vertebrate paleontology of upper Eocene strata in 
the northeastern part of the Wind River Basin, Wyoming. Part 2: 
The mammalian fauna of the Badwater area. Smithsonian Misc. 
Coll., vol. 131, No. 8, 35 pp., 1 fig., 3 pls. 
Hava eRe we. 
1952. The terminology of fine-grained detrital volcanic rocks. Journ. Sedi- 
mentary Petrol., vol. 22, No. 2, pp. 119-120. 
Love, J. D. 
1939. Geology along the southern margin of the Absaroka Range, Wyoming. 
Geol. Soc. Amer. Spec. Pap. No. 20, pp. 1-134. 
1952. Preliminary report on the uranium deposits in the Pumpkin Buttes 
area, Powder River Basin, Wyoming. U. S. Geol. Surv. Circ. 176, 
Pp. I-37. 
1954. Reconnaissance for uranium in the United States, Wyoming. U. S. 
Geol. Surv. Trace Elem. Invest. Rep. 440, issued by U. S. Atomic 
Energy Commission, Techn. Inf. Serv., Oak Ridge, Tenn., pp. 
175-180. 
MaAsursky, HAROLD. 
1952. Geology of the western Owl Creek Mountains (map). Guide Book, 
7th Ann. Field Conf., Wyoming Geol. Assoc. 
Ossorn, H. F. 
1929. The titanotheres of ancient Wyoming, Dakota, and Nebraska. U. S. 
Geol. Surv. Monogr. 55, vol. 2, pp. 1-953. 
