y 
108 
to say where the Marl ends and the Upper Freestone begins. 
and Terebratula fimbria occurs in both beds. 
It is worthy of notice that both the Pea-grit and Oolite 
Marl thin out at almost the same place. Both have their 
maximum development at Cleeve, and both gradually diminish 
in importance as they extend in a south-westerly direction, 
until at Selsley they both show indications of thinning out 
altogether, but the fossiliferous character of each is maintained 
throughout, and the characteristic fossils of the Pea-grit, Tere- 
bratula plicata and Rhynchonella subangulata, and those of the 
Oolite Marl, T. fimbria and R. subobsoleta, are as numerous at 
Selsley, in proportion to the thickness of the beds, as elsewhere, 
but the abundance of the genus Nerinea in the Stroud area 
points to shallow water deposits; and it may be that to the 
increasing shallowness of the sea the cessation of the deposits 
of Pea-grit and Mar] is due. 
The Upper Freestone is of no great importance; it is about 
15 feet thick. The upper bed is the well known fine-grained 
Limestone, full of annelid borings, which is found in so many 
places on the Cotteswolds, and is covered by the Ragstone beds, 
the Gryphite and Upper Trigonia Grits, the Lower Trigonia 
beds being absent. 
The Gryphite Grit of Selsley is without the characteristic 
fossil Gryphea sublobata. This is another peculiar feature of 
the Selsley beds. At Rodborough and Stroud hills the fossil 
is abundant; at Selsley, three miles distant, it has disappeared, 
and, according to Lycett, is not met with again in the south- 
western Cotteswolds. The Trigonia Grit caps the hill along 
the northern escarpment. It is a hard rubbly rock, full of 
fossils, but the Trigonie are not so abundant as at Rodborough 
The Brachiopoda are fairly abundant. 
There is a good Section of these beds in the quarry No. 1, 
on the top of the hill, near the tumulus. It is as follows :— 
ft. ins. 
4 0—Broken-up beds of Clypeus Grit, containing casts of Trigonia 
costata, Terebratula globata, Rhynchonella subtetraédra, Myacites, 
Pedina rotata, &c. 
