172 Scientific Intelligence. 
zed b 
hood of the granitic islands and close to the Nevada shore. 
This is immediately succeeded by the fourth group or Upper 
Coal Measure limestone, a body about 2,000 feet thick of strictly 
pelagic material. 
The whole Paleozoic, therefore, may be summed up as to its 
of 
all the thickest part of the Paleozoic deposits from the 
Wahsatch, rose above the 
ocean and became a land area. Between the new continent and 
th i 
the ocean waves were able to ver. out the Triassi¢ 
nd Jurassic periods the western ocean was accumulating its enor 
mously thick group of conformable sediments upon ¢ 
