ILLUSTRATIONS. 
Page. 
Plate I. Map of part of the Book Cliffs coal field 5 
II. A, Bench at base of Book Cliffs, east of Thompsons; B, Fault in 
Mesaverde formation, 2 miles south of Carbonera 10 
III. Generalized columnar section of the rocks of the Book Cliffs coal 
field 12 
IV. Mount Garfield, 9 miles east of Grand Junction 14 
V. A, Typical exposure of Mesaverde formation, north of Thompsons: 
B, Outcrop of coal in valley of Saleratus Creek 16 
VI. Detailed columnar sections of coal-bearing rocks in Book Cliffs field . . 22 
VII. Little Book Cliffs and Grand River northeast of Palisades 24 
VIII. Coal sections in Book Cliffs coal field 24 
IX. A, Ballard's coal mine, north of Thompsons; B, Outcrop of coal at 
entrance to Ballard's mine, showing jointing of coal 38 
X. Property of the Book Cliff Mine Company at the base of the (lift's 
north of Grand Junction 18 
Figure 1. Map showing relation of the Book Cliffs field to adjacent coal fields. 7 
4 
