18, 



flanks of the canyon along with numerous glacial erratics 

 ranging from cobbles to boulders. There are occasional rock 

 outcrops on the east flank and a fairly extensive outcrop of 

 consolidated clay in the 800 to 900 meter depth range on the 

 west flank. Extensive outcrops of rock and consolidated clay 

 form the steep walls on both sides of the canyon axis. 

 Dredges on these walls yielded primarily dark grey to black 

 micaceous siltstone of mid to late Cretaceous age along with 

 some coarse, unfossiliferous conglomerate. The micaceous 

 siltstone is the same as that found in Lydonia Canyon. Numerous 

 cobbles and boulders were also found on the axis walls. These 

 may be talus blocks from the canyon walls or glacial erratics. 

 Silty and sandy sediments in the thalweg are generally 

 rippled. The extensive rock outcrops and concentrations of 

 glacial erratics in this canyon indicate that it is probably 

 undergoing active erosion. For a more detailed discussion of 

 the geology the reader is referred to Appendix F. 



Fauna not considered in statistical analyses 



Several types of organisms encountered during this survey 

 are excluded from the faunal analyses. The rationale is that 

 where these organisms are found their abundances are usually 

 much too high to allow accurate quantification. These exceed- 

 ingly high densities also have the tendency to obliterate any 

 other faunal trends. Additionally, species characterization 



