PLUTONIC KOCKS. 
567 
In the accompanying diagram (Fig. 617) an attempt is 
made to show the inverted order in which sedimentary and 
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hH 
FI 
m 
trt- p* 
O 
P B 
00 o 
■^3 
o o 
CD ^ 
ps pi 
CD p-t- 
PiP' 
3*” 
I-S c2j 
B p* 
per? 
p 3 
CO 
Lp^ 
g® 
f^P 
fcO Pj 
•* p 
I? 
pip: 
p —• 
Qj u-r. 
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g d 
3,3 
-- p' 
so 02 
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p p. 
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P P 
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pi 
plutonic formations may occur in the earth’s crust. The 
oldest plutonic rock, No. I., has been upheaved at successive 
periods until it has become exposed to view in a mountain- 
