5 2 4 



A. G. LEONARD 



Triceratops 1 was found at a horizon about 150 feet above the 

 Fox Hills sandstone, and in 1908 Dr. T. W. Stanton collected 

 dinosaur bones a few miles north of the mouth of the Cannon Ball 

 River. These were identified as Ceratopsia and Trachodon, and 

 came from beds approximately 100 feet above the Fox Hills sand- 

 stone. 2 



Fig. 5. — The Lance beds exposed in bluff of Little Missouri River near mouth 

 of Bacon Creek, Billings County, North Dakota. Shows many concretions. 



Little Missouri area. — Along the Little Missouri River in the 

 extreme southwestern corner of North Dakota the Lance Beds are 

 excellently shown in the bluffs and badlands bordering the valley. 

 In going down the valley from Marmarth to Yule, many good 

 outcrops appear and one passes from near the base to the top of 

 the formation (Fig. 5). It is seen to be composed mostly of alter- 

 nating beds of shale and soft sandstone, which have a notably 

 dark and somber aspect in marked contrast to the yellow and light 

 gray colors of the overlying Fort Union. The prevailing color 



1 Identified by Mr. C. W. Gilmore. 



2 Proc. Wash. Acad. Sci., XI, No. 3 (1909), 250. 



