72 PROCEEDINGS COTTESWOLD CLUB I90I 
would seem to indicate that this bone-bed is of remanzé 
origin. 
From the general sequence in the immediate neigh- 
bourhood, these Liassic strata appear to belong to the 
planorbis and angulatus zones. At Hartcliff Rocks the 
angulatus-zone is exposed in contact with the Carboniferous 
Limestone. 
The best section of the Lower Lias in this district is 
in a disused quarry near Downside House :— 
feet ins. 
I..  Browa soil” *>-.. I fo) 
2. Sparry lime-rock, locally ae Freestone ” 2 aoe 
3. Brown argillaceous parting ... fC) o% 
A Freestone” 3 ) 
5. Parting similar to 3 fe) I 
‘¢ Freestone” with galena A 4 9 
6 Fossiliferous band, Ostrea liassica, 
; Modiola minima, and Cardinia a fe) 5 
“5. Preestone < fe) 6 
7. Shelly band full of Modiola 1 minima, a gasteropod ) 7 
*\ Preestone =p TE 8 
g, ) Shelly band, casts of Cardinia, Modiola 
minima, and pera ) 2 
“ Freestone ” ae Rey al 7 
9. Parting more arenaceous than iS and 5 zh See: I 
10. Massive beds of “ Freestone,” visible 2 9 
18 11% 
” 
Some of the “ Freestone” is full of ferruginous specks. 
This “Freestone,” locally called the “ Brockley Down Lime- 
stone,” is granular and shelly; “it shows a matrix of 
fine-grained, semi-transparent, and partially crystalline 
calcareous matter, with obscure, and more or less rolled 
organic fragments.”* It contains 4°8 per cent. of silica. 
It has been derived from the Carboniferous Limestone, 
and is somewhat like the Doulting Stone (“Inferior 
Oolite”). A shallow, disused quarry, near Oldhill Farm, 
1 Mem. Geol. Sury., “ Jurassic Rocks, &c.,” vol. iii, p. 33. 
