UTAH ACADEMY OF SCIENCES 39 
the up throw block to the east, at the time of faulting. A 
study of the Wasatch Front Range shows no oil bearing 
rocks in it now and indicates that there probably were 
none at the time of faulting. So even though there seems 
to be at ledst one favorable structure in the rocks buried 
beneath the detrital material which partly fills Salt Lake 
Valley, there can be no oil pools in these rocks without a 
feeding source. 
Cache Valley, as Salt Lake Valley, is partly filled 
with detrital material, which is no more promising ground 
for oil and gas in commercial quantities than is the valley 
fill of Salt Lake Valley. Nor does a study of the Bear 
River Range to the east of Cache Valley or the Wasatch 
Front Range to the west, offer inducements to drill 
through the detrital material into the rocks beneath. 
