170 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



House Range, is found to have Cambrian fossils to its base, there 

 will be over 19,000 feet of Cambrian strata in Utah. I think it 

 quite probable that the quartzitic sandstones and siliceous shales of 

 the Big Cottonwood section were being deposited as near-shore sedi- 

 ments while the calcareous, argillaceous, and arenaceous muds were 

 accumulating at the same time 350 miles (563.15 km.) to the 

 southwest. 



The Upper and Middle Cambrian formations of the House Range 

 section are much like those of the Blacksmith Fork and Mount Bos- 

 worth sections. From the top down the correlation of the various 

 sections is as follows : 



