HELL CREEK BEDS, CERATOPS BEDS AND EQUIVALENTS I93 



in this general region is somewhat obscure — to judge by the different 

 results obtained by the several geologists who have visited it — and 

 owing to the lack of sufficient paleontological data at critical points 

 in the section, it appears that the problem is still short of a complete 

 and wholly satisfactory solution. Thus in 1896 Mr. W. H. Weed" 

 published the record of a section taken along Lebo Creek in which 

 he recorded the presence of over 7000 feet of Livingston beds, above 

 which was a thickness of 4000 feet of Fort Union. A few years 

 later Mr. Earl Douglass" visited this region, and although within 

 a few miles of the Lebo Creek section of Weed, he failed to note the 

 presence of Livingston rocks, referring this part of the section appar- 

 ently to the 'Fox Hills' and 'Laramie.' The same area was sur- 

 veyed by Mr. R. W. Stone"^ and party in 1907, and while he recog- 

 nized tentatively the presence of the Livingston it was presumed to 

 be only a few hundred feet in thickness and is located in another 

 part of the section. The succession as worked out by Stone is as 

 follows: Above the highest marine Cretaceous (Bearpaw of the 

 Montana) in the region is a series of red and greenish sandstones 

 200 to 460 feet in thickness which form a conspicuous ridge, and which 

 was provisionally regarded as a part of the 'Laramie.' The suc- 

 ceeding beds, 1000 to 2400 feet thick, of soft shales and sandstones 

 of a light-gray color, are regarded as the upper part of the ' Laramie. ' 

 At this point Stone says: 



The gray beds of the Laramie formation are overlain, possibly with 

 unconformity, by somber-colored sandstone and shale which may 

 represent the Livingston formation. Sufficient paleontologic evi- 

 dence has not been obtained, however, to determine the limits of 

 these stratigraphic units. 



The thickness of the 'Laramie' is approximately 5500 feet, above 

 which comes nearly as great a thickness of Fort Union. 



This section as interpreted by the writer is as follows: Above 

 the Bearpaw is a series of shaley sandstones, at least several hun- 

 dred feet in thickness, that unmistakably belongs to the Livingston, 

 as plants identical with those found near the base of this formation 



*^ Am. Geol., vol 18, 1896, pp. 201-21 1. 



'^ Proc. Am. Phil. Soc, vol. 41, 1902, p. 217. 



'^*Bull. U. S. Geol. Surv., 341A, 1908, pp. 76-89. 



