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Many collections of fossiliferous material from the 3,000 feet immedi-
ately overlying this bed have been made. None contains diagnostic fossils
well enough preserved to be identified!. Professor B. F. Howell of Prince-
ton University has summed up the evidence from some of the collections
as follows:

Collection 15225: “Most of the fossils in this greenish fragmental rock are segments
of crinoid stems. Some of these segments are very large, like some of those from
collection 15219. There is also a small snail, coiled almost in a single plane,
a few impressions of bryozoans and one impression of a small brachiopod that
is probably a Rhyncospirid (possible Eumetria, which is a Mississippian genus) ;
and there is one specimen that may be an Archimedes-like bryozoan. Archi-
medes is a Mississippian and Pennsylvanian genus; and these beds must be
Carboniferous, I think, perhaps more probably Mississippian than Pennsylvanian.”

Collection 15223: “As far as I can determine from a study of these crinoids the rock
is probably Carboniferous or Permian. None of the crinoid stems is as large
as are some of those in the limestone from locality 15219, so it is probable that
bed 15223 is Mississippian rather than Pennsylvanian or Permian.”

Collection 15219 (grey crystalline limestone containing detrital quartz sand) : “Most
of the fossils are crinoids, but there is a small snail, coiled almost in a single
plane (but not a Bellerophontid), a phosphatic worm tube, traces of two types
of articulate brachiopods (one of which may be a Productid), and what may be a
small inarticulate brachiopod. There is one fossil that may be a wide hinged
spiriferid brachiopod (which would indicate a probably Mississippian age if it
were really such).”

Collection 15224 (grey limestone containing pebbles of volcanic rock): “Possibly
Permian. One large, vase-shaped fossil is almost certainly a sponge. So is a
small, tubular fossil. Other smaller spherical bodies may be sponges. The
presence of pebbles, and sponges, probably indicate shallow water deposition of
the limestone. As sponges are abundant in the shallow water limestones of
Permian age in the southwestern United States, such evidence as the sponges from
this locality afford indicates a probably Permian age for these beds. The crinoidal
material might well be the remains of a Permian crinoid.”

Thus the evidence available indicates that this map-unit includes
beds from Mississippian to possibly Permian age.

CORRELATION

Correlation of these late Paleozoic rocks with formations elsewhere
on the basis of paleeontological evidence is unsatisfactory. The only fossil
identified with any assurance indicates a correlation of the enclosing strata
with the late Mississippian Brazer formation of Idaho, and the Rundle
formation of the Lake Minnewanka area, Alberta (Shimer, 1926; Kelly,
1942).

On the basis of general lithology and structural and stratigraphic
position, much of this map-unit probably corresponds with parts of the
Asitka group of Permian and (?) earlier age, exposed in the McConnell
Creek map-area to the west (Lord, 1948). However, as the stratigraphic
limits of neither map-unit are precisely defined, and as there are, in places,
marked dissimilarities in lithology and faunal communities, it is thought

1 The writer is indebted to Dr. A. E. Wilson, Mr. L. D. Burling, and Dr. P. Harker of the
Geological Survey; Dr. B. F. Howell and Dr. S. K. Fox of Princeton University; Dr. E. C. Stumm of
the University of Michigan; Dr. V. J. Okulitch of the University of British Columbia; Dr. M. A.
Fritz of the University of Toronto; and Dr. T. H. Withers of the British Museum for their kindness
in examining this material. A

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