UTAH ACADEMY OF SCIENCES 41 
hard siliceous floor at some distance lest he become too 
heavily loaded, for it is no light task to carry ten pounds 
of this material on both feet sinking to one’s shoe-tops 
with each step. 
From a distance the brilliant coloring, red, green, 
white, and purple, is certainly a sight one will never for- 
get. All the lines are smooth curves with no broken jag- 
ged contours to displease the eye. And every change of 
position brings in more pleasing combinations. No won- 
der the gigantic Allosauri chose this for their Mecca and 
burying place. For everywhere you will see piles of bones, 
now ornamenting the top of some knoll of many colors, 
now scattered about on some small flat. Truly it is a sight 
worth seeing. 
But of present day life, either animal or plant, there 
is a woeful lack. A few stunted pines and cedars here, 
some greasewood there, while in the more sandy places one 
will see a small area of sand-grass waving gently in the hot 
breeze. The animal life, what there is of it, partakes of 
the color scheme of the country. Lizards, for that is about 
all one can find, are generally brilliantly colored. Very 
few snakes can be seen as they seem to need a respite from 
their basking habit, while here this would be impossible, 
for the atmosphere hardly gets time to cool before the sun 
again appears over the horizon to clinch his conquest of 
the day before. 
ECONOMIC FEATURES. 
This phase of the Jurassic will be easily disposed of. 
Still this period gives a good example of syngenetic ore 
deposits. The ores found have proved to be of little eco- 
nomic value. Chief among them are copper, manganese, 
iron, uranium, vanadium, sulphur, gypsum, and limestone. 
Of these copper occurs as malachite; manganese as psilome- 
lane; iron as hematite; and uranium and vanadium as 
carnotite. The copper and manganese ores occur in lenses 
laid down with the arenaceous shales at the base of the 
gypsiferous series. Sometimes they form pockets suffi- 
ciently large to obtain a few carloads of ore. These pockets 
