NATURAL HISTORY. 
ravines, and hollow basins, formed by the inequali- 
ties of the surface, extensive peat bogs are formed. 
2.—THE SLATE FORMATION. 
Rocks of this character rank next in age, and 
occupy a considerable portion of the district ; they 
are situated on the southern and eastern sides of the 
granite, on which the older portion rests, their 
general direction being the same, The distinction 
and limits between what is undoubtedly of primitive 
formation, and what as is equally obvious, must be 
considered as transition slate, has been as yet very 
imperfectly ascertamed,—a north eastern range 
bounded by the granite on one side, and the western 
limits of the Transition Lime stone which we shall 
trace further on, appears to be of primitive origin. 
it occupies nearly the whole of Doddiscombesleigh 
and Christow, and may be followed through the 
eastern parts of Hennock, Bovey Tracey, Ilsingtun, 
and Ashburton, to, and beyond the Dart—whilst a 
second more easterly range, commencing with, and 
having the same general limits as the Lime rock to 
the west, and the higher parts of Combeintinhead, 
Ipplepen and Staverton, to the East, and occupy- 
ing nearly the whole of West Ogwiil and Woodland, 
