546 A. C. PEALE 
almost horizontal in this immediate place but only a short distance 
away are seen to dip gently toward the north or northwest beneath 
the supposed Judith River beds which cap the ridge. The relations 
of the Pierre and overlying Fox Hills in the latter outcrop were 
plainly seen, as they dip normally beneath the Judith River beds. 
From this point we turned back toward Dog Creek, crossing 
it about eight or ten miles farther south than our crossing on the 
way eastward, and thence we returned to Lewistown. ‘The prin- 
cipal result of this trip was the determination of the geological 
position of the true Judith River beds to be above the Fox Hills, 
verifying Stanton’s observations of 1894, and confirming his 
original opinion that when the Fort Pierre shales—or, as he renamed 
them, Bearpaw shales—appear to lie above the Judith River beds 
it is due to faulting. 
It was determined to examine next the supposed Judith River 
exposures in other areas mentioned by Stanton and Hatcher. 
Here again we went to the southward to avoid the complicated 
region about Bearpaw Mountains, especially as lack of time pre- 
vented our going northward to and beyond the Canadian line. 
The areas in Assiniboia are, according to the Canadian reports, of 
undoubted Belly River age, as described first by Dr. G. M. Daw- 
son.’ These beds were traced by Stanton and Hatcher to the 
vicinity of Havre, Mont., where they lie beneath Pierre shales 
without any unconformity or faulting. The first area visited by us 
was that on Fish Creek in which the section was gone over from the 
Jurassic up through the Cretaceous to the Fort Union. This sec- 
tion is essentially the same as that given by Douglas? and subse- 
quently examined by Fisher. However, instead of finding Laramie 
resting on the Fox Hills, in which the characteristic Halymenites 
occurs, the beds lying immediately above were found to be of Liv- 
ingston age with a typical flora, and between them and the undis- 
puted Fort Union are good exposures of the Lance formation. It 
is, however, in the lower portion of the section that we are most 
interested. It is possible, as Fisher suggests, that the beds referred 
by Douglas to the Jurassic may belong to the Kootenai, as there is 
‘Geol. Surv. Canada, 1882-84, p. 116. 
2 Proc. Am. Phil. Soc., XLI, 207-24. 
