34 THE BOOK CLIFFS COAL FIELD. 
The higher coal here is in two benches, as at the Hunter mine, 
but it has not been prospected. Little is known of the coal between 
the Lane and Johnson mines and Carbonera, near the Colorado- 
Li ah boundary. Though undeveloped, coal has been found wherever 
sort ions have been made; for instance, at the west side of the en- 
trance to the canyon of East Salt Creek, 6 miles southwest of Turner's 
ranch, there are two beds of coal, one 2 feet and the other 5J feet 
thick, separated by an interval of about 252 feet. 
Section at entrance, of East Salt Creek canyon, 6 miles southwest of Turner's much. 
Ft. in. 
Sandstone, red 20+ 
Coal 5 6 
Shale, carbonaceous 21 
Sandstone, white, locally red .' 20 
Shale, drab 19 
Sandstone, buff *. 49 
Shale, drab, and thin beds of buff sandstone 54 
Sandstone, buff : 19 
Shale, drab 15 
Sandstone, buff and white 30 
Shale, carbonaceous 25 
( oal 2 
Sandstone, buff a nd white 30 
Shale, drab, and thin beds of buff sandstone 125 
Sandstone, buff 50 
Shale, Man cos. ■ 
484 6 
About 3 miles southwest of Turner's ranch and half a mile up from 
the mouth of a small eastern tributary of East Salt Creek a waterfall 
exposes a bed of coal 21 feet 5 inches thick, which is the thickest bed 
observed in the entire area under consideration. No development 
and but little prospecting have been done here, and the lateral extent 
of this coal bed has not been determined. It appears, however, to 
be a lens, for in following the coal to the west along the hillside above 
the gulch it was found to thin out and disappear. 
Considerable prospecting has been done in the valley of West Salt 
Creek, and at Carbonera a mine is being worked by the Uinta Railway 
Company. In this vicinity the local undulating structure (see p. 22) 
causes the coal to lie within a relatively moderate depth below the 
surface. The following section was measured here: 
Section of coal-bearing rocks near Carbonera. 
Sandstone, fossiliferous, buff (containing Unio vivipara, Gonio- 
basis, and Tulotoma thompsoni) 15 
Shale, drab, and thin beds of buff sandstone 65 
Sandstone, buff 4 
Shale, carbonaceous 3 
Sandstone, buff 5 
