NATURAL HISTORY. 
The economical and ornamental purposes to which 
this rock is applied, we shall notice in its proper 
place. 
We may here observe that a rock somewhat 
similar to the Amygdaloidal Trap described farther 
on, may be met with at several points of the junc- 
tion between this and the Slate formation—it often 
contains a Jarge proportion of Iron, and deserves to 
be more accurately traced and examined, 
THE RED SAND STONE, 
Is that of which as the formation next in order 
we are now to treat—a line swept from Exeter and 
Ide through the eastern part of Dunchideock, and 
round the eastern edge of Haldon, and thence on 
through part of Ideford—Bishopsteignton—Kings- 
teignton, the eastern side of Woolborough, and 
through Abbot’s Kerswell and Ipplepen on to the 
Dart, includes the western limits of this formation ; 
The truth appears to be, that in many of the caves the 
bones were collected at two different, though certainly not 
very distant periods ;_ The first when they were the abode 
of certain animals, the second when other bones. were 
transported there by a general catastrophe. 
