(iEOLOGlCAL ENQUIRY. .37 
1 
. , , large admixtures of animal and vege- 
table remains. ^ 
1 action of all these forces will be ren- 
etfp t intelligible by examples of their 
view readers for a synoptic 
0 t lem, to the section which forms the first 
my series of plates.* The object of this sec- 
IS, first, to represent the order in which 
e successive series of stratified formations are 
ined on one another, almost like courses of 
sonry , secondly, to mark the changes that 
occur in their mineral and mechanical con- 
ation ; thirdly, to show the manner in which all 
s ratified rocks have at various periods been 
IS urbed, by the intrusion of unstratified crys- 
tionT'' 1’^°''^^ I variously affected by eleva- 
and dislocations; 
the fn examples of the alterations in 
acconrnm ^ vegetable life, that have 
ditions of tT ^ changes of the mineral con- 
uiiions of the earth. 
are einb/^i^ iiimve section it appears that there 
stratiffed rockT crystalline un- 
divisions of fl ’ f^muty-eight well defined 
the avern formations. Taking 
divisions K thickness of each of these 
’ thousand feet,t we should have 
* Tlig 
^cription of tlip of this section is given in the de- 
+ Many form^ - * "• 
the average here^tlkln^"^*^*'^ exceed, whilst others fall short, of 
