20 
THE BOOK CLIFFS COAL FIELD. 
of gray conglomerate rests upon an undulating surface of massive 
buff sandstone. The conglomerate is interbedded with lenses of fine 
red sandstone and is composed of rounded pebbles of quartz, quartz- 
ite, and chert, colored red, pink, black, and white, in a sandy matrix. 
Above the conglomerate north of Thompsons there are several beds 
of buff sandstone and drab shale and three thin intercalated layers of 
conglomerate, above which there are several hundred feet of red, pur- 
ple, green and drab shales, including a few thin beds of drab siliceous 
limestone. 
The following sections indicate general conditions, their upper 
limits marking no particular horizons. 
Section of Eocene in Horse Canyon. 
Feet. 
Shale, yellowish 4 
Limestone, fine buff to white (rich in 
fossils, p 21) 1 
Shale, drab 20 
Sandstone, calcareous 1 
Shale, varicolored 10 
Sandstone, buff 5 
Shale, green, purple, red 15 
Shale, drab 20 
Shale, varicolored 10 
Shale, drab 25 
Sandstone, buff 4 
Shale, drab 10 
Shale, varicolored 40 
Shale, drab 20 
Shale, varicolored 40 
Shale, drab 20 
Sandstone, white 10 
Shale, drab 10 
Sandstone, greenish 1 
Shale, olive-drab, sandy 45 
Shale, buff to drab, sandy 25 
Conglomerate and sandstone 4 
Sandstone, massive, buff (Mesa- 
verde?). 
340 
Section of Eocene 5 miles north of Turner's 
ranch. 
Feet. 
Sandstone, buff and white 20 
Shale, red 7 
Shale, purple 2 
Sandstone, buff 2 
Shale, purple 3 
Shale, drab 12 
Shale, red 7 
Shale, drab 37 
Sandstone, buff 15 
Concealed by talus 115 
Sandstone, buff 25 
Shale, drab 15 
Sandstone, gray 7 
Shale, purple 7 
Shale, drab 35 
Sandstone, buff 15 
Shale, reddish 18 
Sandstone, buff ,. . 2 
Shale, drab 25 
Sandstone, buff 5 
Shale, drab 25 
Shale, purple 5 
Sandstone, buff § 
Shale, drab 20 
Shale, red and purple 75 
Sandstone, massive, white (Mesa- 
verde?). . 
504 
At least 750 feet of the variegated beds are exposed in this area, but 
the top of the formation was not determined. Peale a gives the fol- 
lowing measurements of the Eocene at White Mountain on Grand 
River north of De Beque: Green River, 2,282 feet; Wasatch, 1,650 
feet; total Eocene, 3,932 feet. 
oPeale, A. C, Geological report on the Grand River district: Tenth Ann. Rcpt. U.S. Geol. and Geog. 
Survey Terr., 1878, p. 190. 
