40 TRANSACTIONS OF THE 
domes breaking the sky line at a distance remind one of 
some Moroccan City. 
In Emery County, on the west reef of the San Rafael 
Swell, some of these domes assume immense proportions. 
One of these particularly large and perfect is called the 
Copper Globe, another one the Temple and still another St. 
Peter’s Dome. 
The Bad Land appearance of the Middle Jurassic is 
strongly contrasted with the above. It weathers into low 
hills covered with a light sand which is blown about by the 
winds forming ever changing ridges and hollows. These 
dunes keep the eastern portion of Emery County barren 
of vegetation. And the whole country has a barren, monot- 
onous landscape. In places these dunes and clay ridges 
have been made permanent by the cementing action of the 
gypsum, which causes them to appear as though they had 
been subjected to folding of a high order. The scenery pre- 
sents a general somber appearance due to the ever present 
ferric oxide. The lower portions are bright red while the 
upper portion is almost a maroon separated by a com- 
paratively narrow band of faint green. 
A siliceous conglomerate caps this and forms the floor 
for the bad lands of the upper Jurassic. The difference 
between this series and the preceding is that all the hills 
in the Middle Jurassic are generally flat-topped while in 
this they are rounding knolls with smooth, gently sloping 
sides. Around the base of all these small knolls are wagon- 
loads of black water-worn pebbles, the origin of which is 
not at first apparent. 
In weathering, this conglomeritic series parts with 
its quartz pebbles, which roll to the foot of the slopes and 
leave the calcareous material to protect the remainder. 
When dry this finely divided calcareous residue is very 
light and one will sink into it from four to six inches, 
making progress exceedingly difficult. It contains very 
little grit and feels like an impalpable powder. When rain 
wets it, it shows its clayey nature and sticks together, very 
little of it being washed away unless the rain be exceedingly 
severe. When in this condition one had better keep to the 
