STRATIGRAPHIC POSITION OF JUDITH RIVER FORMATION 649 
turn or dislocation is involved, no better stratigraphical evidence can possibly 
be offered.t 
Tyrrell’s work in 1886? was in the northern part of Alberta and 
the western edge of both Assiniboia and Saskatchewan on drainage 
tributary to Red Deer River, Ghost River, Bow River, and both the 
North and South Saskatchewan. His section in this area from the 
Belly River series to the Laramie, including both, is as follows: 
Laramie FEET 
Paskapoo Series: Gray and brownish weathering, lamellar 
or massive sandstones, and olive sandy shales. This 
is an exclusively fresh-water deposit................ 5,700 
Edmonton Series: Soft whitish sandstones and white or 
gray, often arenaceous, clays, with bands and nodules 
of clay, ironstone, and numerous seams of lignite. These 
are of brackish-water origin and correspond to the 
lowest portion of the St. Mary River series of Dr. Daw- 
son’s Report (Geol. Survey Report for 1882-84, p. 114¢) 700 
Fox Hills and Pierre 
Brownish weathering sandstones and dark gray clay shales 600 
Belly River Series 
Soft, whitish sandstones and arenaceous clays, changing 
toward the east to light-brownish and yellowish sand- | 
stones and sandy shales, bottom not seen............ 
From what we have detailed in the preceding pages, it seems 
impossible to avoid the conclusion that the stratigraphic position 
of the Judith River beds is above the Fox Hills sandstone which in 
turn rests on the Pierre shales. The Judith River thus holds exactly 
the same interval in the geological column that is occupied by the 
Lance formation and not that of the Belly River series of Canada, 
nor that noted for their equivalent beds in the United States. The 
lithological resemblance between the beds of the Belly River series 
and the Judith River formation does not count for much and is no 
greater than that between the Lance formation and the Judith 
River beds. Dr. Stanton, referring to the Belly River series, says: 
Mr. McConnell in reply to an inquiry makes the following statement to the 
writer: ‘I have had no reason to change my mind in regard to the relative positions 
of the Belly River and Pierre formations as given in the report you refer to. I have 
not done any work in recent years on the plains, but the work done by others of the 
Survey has all been confirmatory.” 
2 Geol. Surv. Canada, II, ‘“Report for 1886,’’ Montreal, p. se. 
3 Bull. U.S. Geol. Surv., No. 257, p. 26. 
