
CRETACEOUS AND TERTIARY—GENERAL ARRANGEMENT. 147 
siderable distance above the Eagle Hills. The beds examined in the 
localities referred to by both Hind and Hector, and those of Pembina 
Mountain, would seem to belong to the upper part of the 4th group, for 
Prof. Meek in writing of the fossils states that they are of species which 
occur in No. 5, as well as No. 4, but mere commonly in the latter, which, 
with the lithological character of the matrix “ leaves little room to doubt” 
that the beds represent No. 4. 
357. Division C., of Dr. Hector’s section, correlated by him with No. 
3 of the Nebraska series, may now, I believe, also be certainly included 
in No 4. It is described as consisting of “dark purple and brown 
laminated clays, with ironstone septaria, and sometimes crystals of 
selenite.’* These beds were found at Fort Ellice, on the Assineboine; at 
the elbow of the South Saskatchewan, in relation with the escarpment of 
the third prairie plateau; at the base of the Cypress Mountains on their 
northern side, at the Eagle Hills, and on the North Saskatchewan at Fort 
Pitt. From the South Saskatchewan locality, Baculites compressus 
Inoceramus (I. Crepsii of Roemer and Conrad ?) Pholadomya occidentalis 
Morton, Cardium, Exogyra, Astarte Texana, and Cytherea were obtained, 
and are in themselves sufficient to mark the horizon with some certainty. 
: 358. I have described similar rocks, certainly referable to No. 4, 
about fifty miles southward of the Cypress Mountain locality, referred to 
in the last paragraph ; and a considerable stretch of country south of 
these hills appears to be based on this member of the formation. One 
hundred and twenty miles southward of the locality on the south Sas- 
katchewan, and south of the Lignite Tertiary plateau, sombre Creta- 
ceous clays, with large septarian nodules, exactly resembling those 
described by Dr. Hector, and containing some of the same fossils, are 
found, and are known to belong to division 4, not only by the fossils, but 
by their stratigraphical relation. These rocks were also found, as 
already stated, to contain thick bands, indistinguishable from the harder 
clay-shales of Long River and Pembina Mountain. 
Cretaceous No. 5.—Fox Hill Group. 
359. The Fox Hill group, is the highest of the Cretaceous series of 
the west, and is thus described in the Nebraska section :—‘‘ This forma- 
tion is generally more arenaceous than the Ft. Pierre group, and also 
differs in presenting a more yellowish or ferruginous tinge. Towards 
* Exploration of British North America, p. 226, 

