96 
The lower 100 feet of the exposed section on Gulch creek consists of 
massive and shaly sandstone with much plant debris. At the very top of 
this 100 feet, the specimen of Inoceramus cf, lundbreckensis was collected. 
Then follow 40 feet of similar rock, followed above by hard, massive, 
crossbedded sandstone. In this sandstone, and 185 feet above the base, 
other marine fossils were found, including Legumen napii and Ostrea 
saxitoniana. In addition to the above an indeterminate plant, possibly a 
fucoid, was found at 100 feet. 
COBBTJLA FAUNA 
This fauna is in the lower coal zone of the Allison formation which is 
exposed on Gulch creek and in a tunnel just east of Matheson creek 
(Matheson creek enters Crowsnest river from south, a little east of 
Crowsnest lake). It is listed below: 
Fossil lot No. 
CAS 
CCla 
Feet above base of exposed Allison in Gulch Creek section 
315 
Modiolus sp, 
C* nrhuln nf n tarn rtAnfji TVf anfi H 
Af pJ/inin? a f. tohi tanimi SfantOn 
“ Rhytophorus” sp. . . , , 
Above the sandstone at 185 feet, on Gulch creek, there is massive 
sandstone with a little plant debris, followed by a few feet of arenaceous 
shale, a small, irregular coal bed, and a 4-foot bed of grey and bluish shale. 
In this shale, at about 315 feet (CA5) above the base of the exposed section, 
a brackish or mixed fauna with Modiolus, Corbula, and Melania was found. 
At about the same horizon (CO la) in the coal tunnel east of Matheson 
creek and just above the second coal layer, Corbula, Melania, and “ Rhyto - 
pkorus” were found. This mixed or brackish fauna forms, in a manner, a 
transition from the marine fauna below to the entirely freshwater fauna 
of the upper Allison above. 
ZAMITES ALBEBTENSIS FLOBA 
This flora occurs near the Corbula fauna stratigraphically in the 
lower coal zone of the Allison formation. The flora was found at two 
places; at CA6 on Gulch creek several feet above the Corbula horizon 
CA5 and separated from if by a thin coal layer; and in the coal tunnel 
east of Matheson brook at about the same horizon (CC1) as the Corbula of 
CCla. The flora is listed below: 
Fossil lot No. 
CA6 
CC1 
Feet above base of exposed Allison on Gulch creek 
*318 
G&initzia formosa Heer ... ... 
Zamites alhertensis Berrv. . . . . 
Pln.ia.nus sp 
Viburnum sp 
Tar odium ? sp 
Asplenium ? rnlnradoensis TCu 
Brachyphyllum macrocarpum Newb ...... 
Approximate. 
