NATURAL HISTORY. 
some of the inferior strata—the resemblance of the 
different fragments it is composed of, to the older 
rocks in its immediate neighbourhood, appears to 
bear out this opinion; we may here observe, that 
the only kind of rock in the vicinity of which it 
contains no fragments, is that of the hornblende or 
greenstone. Its containing no organic remains, 
though these are abundant in the strata immediately 
below and above it, and its general want of consoli- 
dation, certainly argue that its formation must have 
taken place under different circumstances, and by a 
different process from either of these. 
As to the Amygdaloidal Trap, we may leave it 
a mooted point whether the beds may be considered 
as a series of Whin Dykes; or Depositions, and con- 
cretions more nearly connected, and cortempora- 
neous with the strata that envelop them, our own 
opinion inclining to the former. 
The green sand is a still more recent member of 
the secondary class than the red, it abounds with 
fossil marine shells, and appears to have originated 
in sedimentary deposition. The flint strata incum- 
bent on it, may be considered as connected with the 
chalk formation in Dorsetshire, on which they are 
there incumbent, as with us they are on the green 
sand, 
And lastly respecting the Bovey clay and coal 
formations, the former of these we are not inclined 
to ascribe to a period eariier than the last convul- 
sion; nor is it improbable that the same Diluvial 
action, so obvious in the excavation of our present 
