EXPLANATION OF PLATE 1. 3 
As it would encumber the section to express Diluvium, 
erever it is present, it is introduced in one place only, 
th its age to be more recent than the newest of 
e Tertiary strata ; it is found also lodged indiscrimi- 
® y upon the surface of rocks of every formation. 
Granite. 
In om early Chapters we have considered the Theory 
^ ich refers unstratified rocks to an igneous Origin, to be 
at which is most consistent with all the known Pheno- 
mena of Geology, and the facts represented in the Section 
now before us are more consistent with the Postulates of 
, Hypothesis, than with those of any other that has 
itherto been proposed. I have, therefore, felt it indispen- 
sable to adopt its language, as affording the only terms by 
which the facts under consideration can be adequately de- 
scribed. 
Assuming that Fire and W'ater have been the two 
^eat Agents employed in reducing the surface of the globe 
Its actual condition, we see, in repeated operations of 
• agents, causes adequate to the production of those 
^e^lar Elevations and Depressions of the fundamental 
lov\^ * Granitic series, which are delineated in the 
enti^*^ Hegion of our Section, as forming the basis of the 
flii-T *'*ght extremity of this Section, the undulating 
surface of the fundament;i Granite (a. 5. a. 6. a. 7. a. 8.) 
uf the'^S^^*'*^^*^ lor the most part, beneath the level 
Gran't*^^^ extremity of the Section (a. 1. a. 2. a. 3.) the 
which h ^^^'^uted into one of those lofty Alpine ridges, 
ao..; effected, by their upward movement, the entire 
«unes of stratified Rocks. 
lesponding formations of Primary and Transition 
