Lazeart sandstone lentil of Adaville formation. [Lazeart sandstone member of Adaville formation adopted by the USGS June 27, 1906.] At base of Adaville formation is a prominent white sandstone (Lazeart sandstone member), 100 to 200 feet thick, immediately above which is Adaville-Lazeart coal, 20 to 84 feet thick, and associated with it beds containing plants and invertebrate remains older than Laramie; the overlying strata contain lower Laramie leaves [see entry under Adaville]. Age is Late Cretaceous.
Named from its typcial exposures near the Lazeart coal mine [located along Albert Creek, about 1 mi northwest of The Boilers and southwest of intersection of I-80 and U.S. Highway 189, in sec. 8, T. 15 N., R. 118 W., Ragan 7.5-min quadrangle], Uinta Co., southwestern WY. Notable exposures south of town of Moyer; forms hogbacks along western edge of Mammoth Hollow [Cumberland Flats], Lincoln and Uinta Cos., southwestern WY (see pl. 3, areal geol., scale 1:125,000).

Source: Publication; US geologic names lexicon (USGS Bull. 896, Adaville entry p. 13); GNC index card files (USGS-Reston).

Pg. 16 (fig. 4), 17-18. Lazeart sandstone member of Adaville formation. Basal member of Adaville formation. Consists of white sandstone 100 to 200 feet thick. Underlies Adaville-Lazeart coal. Overlies Hilliard formation. No fossils. Age is Late Cretaceous.

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 2124).