Oe, ee —— 
37 
(2) The stratigraphical range of the Pea Grit in the Cottes- 
wolds is considerably greater than has been supposed: it 
extends from Cleeve hill to Selsley, at least twenty miles, and 
from the escarpment of the Cotteswolds at the Horsepools to 
Chalford, at least seven miles, and possibly beyond, but there 
are no means of tracing it further in that direction. Professor 
Hout, in his Memoir of the Geological Survey of East 
Gloucestershire, says the Pea Grit does not extend further 
towards the south-west than Painswick hill, but this is clearly 
a mistake. Dr. Lycerr says that from Cleeve hill to Birdlip 
hill would seem to include the limits of the Pisolite upon the 
western face of the Cotteswolds, and it has not been detected 
at any point far within the range eastward of a line connecting 
these two hills.* The sections which I have taken will how- 
ever show that it extends over the area assigned to it, even 
supposing it terminates with that area, which is by no means 
certain. 
It is, I believe, the opinion of some of our eminent Cotteswold 
Geologists that the Pea Grit forms the true base of the Inferior 
Oolite. It certainly presents the Oolitic structure on an 
unusual scale, and if not the commencement of the Oolitic 
deposits, it deserves to be so considered; but we must take the 
facts as we find them, and it will appear from the second part 
of this paper that the Inferior Oolite deposits had commenced 
long before the Pisolites began to form, and that the granular 
structure prevailed in those deposits. 
In the Cheltenham area the thickness of the Pea Grit 
proper and the Pisolitic beds is considerable, but the measure- 
ments hitherto published have, with one exception to be 
presently mentioned, included the underlying beds, which are 
not Pisolitic. I make the Pisolite, excluding the underlying 
beds, but including the Pea Grit proper and the Pisolitic 
Limestone, about twenty-eight feet at Crickley hill, but at the 
west end of the quarry the beds are divided by seven feet of 
Oolite, and’ are much thicker than in the middle or the east 
* Geology of the Cotteswold Hills. 
