STRATIGRAPHY. 13 
Junction, the following measurements were made, but no Dakota fos- 
sils were found, and the limits of the formation were not determined : 
Section of strata south of Grand Junction. 
Feet. 
Shale, drab (Mancos) 5 
Sandstone, buff, lens (Dakota?) 
Shale, carbonaceous, containing thin layers of coal (Dakota?) 20 
Sandstone, massive, cross-bedded, cream-colored, quartzitic, includ- 
ing irregular lenses of conglomerate with rounded pebbles of chert 
and quartzite up to 1 inch in diameter (Dakota) 20 
Shale, drab, probably below Dakota I 
Sandstone, greenish drab, shaly 2 
Shale, greenish drab 20-f 
68 
Between Grand Junction and Fruit a the outcrop of the Dakota lies 
immediately south of Grand River, but the formation is covered by 
sand and gravel at many places. In this locality the carbonaceous 
shale is well developed, and at several places there are coal prospects. 
In a creek about midway between Grand Junction and Fruita the fol- 
lowing section is exposed : 
Section of Dakota (?) coal beds in (reek midway between Grand Junction and 
Fru it a . 
Ft. in. 
Sandstone, buff 4 
Shale, carbonaceous 2 
Coal I 6 
Shale, carbonaceous 1 
Coal (varies from 2 to 3 feet) 2 
Shale, carbonaceous (> 
Coal 8 
Shale, carbonaceous 8 
12 10 
The formation crosses the river west of Fruita and the following sec- 
tion was measured south of Loma: \ 
Section of Dakota sandstone south of Loma. 
Feel - 
Shale, dark with local carbonaceous layers (Colorado). 
Sandstone, buff, including thin layers of shale and lenses of conglom- 
erate with pebbles of chert and quartzite 10 
Shale, greenish, sandy 50 
Sandstone, buff, and conglomerate . # 25 
Sandstone, white 20 
Shale, varicolored (Jurassic). 
L35 
South of Thompsons, Utah, there are 100 feet of massive white and 
buff sandstones, cross-bedded and locally conglomeratic, lying bet weeo 
drab shale above and varicolored shale below. At this place the car- 
bonaceous beds seem to be absent, and they were not found farther 
