94 
At the top of this section are about 570 feet of concealed strata between 
the highest outcrop of Colorado shale and the lowest exposure of the 
Allison formation. The fauna of the 1,650 feet of exposed strata is listed 
below: 
Fossil lot No. 
1—1 
pq 
O 
Cq 
pq 
O 
pa 
o 
03 
w 
o 
pq” 
O 
Feet above base exposed section 
© 
CO 
O 
»— i 
© 
© 
© 
§ 
© 
00 
© 
© 
CO 
rH 
o 
o 
"<* 
© 
© 
1—1 
© 
iO 
© 
1— < 
Baculites of. anceps Lamarck 
B. at. asper Morton , 
— 
— 
B. sp 

Placenticeras syrtale (Morton). 
Scaphites ventricosus M . and TT . . 
S. ventricosus var. stantoni Reeside. 
.S', ventricosus vh.t_ sari txmianus MnLfiarn 
— 
.... 
S. vermiformis M. and H 
Inoceramus pontoni McLearn ...... 
I. coulthardi McLearn, , 
— 
I. exogyroides M . and H 
" 
/. undabundus M . and H . , 
Martesia mcevoyi McLearn. . ......... ...... ....... . 
Pholadomya nitanae McLearn. ........ 
Pteria nf_ nebrn.se/inn. F. and S 
— 
— 
— 
— 
The fossiliferous strata at 30 feet are exposed in a railway cut east of 
the Wheatcroft house and east of the railway crossing. The fossiliferous 
beds at 170 feet are found in a railway cut just west of the railway crossing. 
The strata from 590 to 1,650 feet outcrop on both sides of Crowsnest river 
from near the Legal house upstream beyond the mouth of Allison creek. 
The fossils occur chiefly in concretions in shale, more rarely in shale, and 
very rarely in arenaceous shale. 
The fauna embraces the following species: Baculites cf. anceps 
Lamarck, B. cf. asper Morton, B . sp., Placenticeras syrtale (Morton), 
Scaphites ventricosus M. and H., S. ventricosus var. stantoni Reeside, S. 
ventricosus var. saxitonianus n. var., S. vermiformis M. and H., S. sp., 
Inoceramus pontoni Me Learn, J. coulthardi McLearn, I. exogyroides M. 
and H,, I. undabundus M. and H., Martesia mcevoyi n. sp., Pholadomya 
nitanae n. sp., and Pteria cf. nebrascana E. and S. The fauna, as pre- 
served, is a none too prolific one and consists chiefly of species of the 
ammonoid genera Scaphites and Baculites and of the pelecypod genus 
Inoceramus. Rare and poorly preserved gasteropods and echinids are 
present, but are not worthy of identification or description. The boring 
pelecypod Martesia is interesting, being present in its natural position, in 
silicified wood fragments. 
The Scaphites ventricosus fauna ranges throughout the greater part 
of this section and perhaps through all of it. The first authentic appear- 
ance of S. ventricosus is at 840 feet. But Baculites cf. asper Morton is 
found as low as 590 feet and, therefore, the S. ventricosus or “Niobrara” 
fauna may be authentically said to range as low as this horizon. Fossils 
are very rare and poorly preserved in the lowest part of the section. 
Scaphites first appears at 170 feet. The species cannot be determined. 
