120 
LOWER OOLITIC ROCKS OF ENGLAND : 
Kagstones 
Freestones 
Pea Grit 
Series. 
Midford 
Sand. 
White Oolite. Pale oolite "with few 
fossils - 
Clypeus Grit. Coarse marly oolite ; 
Terebratula gldbata very abundant, 
especially in upper part. Clijpeus 
Ploti, Nerincea Guisei (Guisei-bed of 
Hudleston), &c. - 
Hard earthy and sandy limestones with 
few fossils .... 
Upper Con j B ^ _ 
Upper Trigonia Grit. Hard grey 
shelly and marly limestones, with 
Trigonia angulata, T. costata, Rhyn- 
chonella spinosa, &c. - 2 6 to 
Gryphite Grit. Brown ferruginous 
marly and sandy limestone, with 
loamy layers, Gryphcea sublolata, 
Astarte elegans, &c.- - 1 6 to 
Upper Freestone. False-bedded oolite, 
bored on top ; with few fossils 10 to 
Oolite Marl. Soft oolitic marly lime- 
stone and marl ; Nerincea, Terebratula 
finibria, Eliynchonella subobsoleta, &c. 4 
Lower Freestone. Fine and coarse- 
grained oolite, more or less false- 
bedded, and with shelly detritus iii 
places - - - 50 
f Pea Grit .... 3 
< Lower Limestone - - 15 
I Brown Ferruginous Beds 
f Cephalopoda Bed 
FT. IN. 
5 
5 6 
4 o 
12 a 
20 o 
Oto6 
\ Cotteswold Sands 
Oto90 
Oto 4 
Oto25 
9 
5 
- about 110 
In addition to the sections on Stroud Hill, which are known as 
the Workhouse quarry, Conygre quarry, and another quarry in 
Horns Valley on the southern slope of the hill, there are many 
sections along the borders of the Stroudwater Hills. The same 
subdivisions may be studied in different places ; thus the opening 
known as Walls quarry, south of Brimscombe, affords a good 
section of the Ragstones, Upper Freestone, Oolite Marl, and' 
Lower Freestone, and the building-stones have been worked by 
means of extensive galleries in this quarry.* Other sections are 
exposed in the Golden Valley east of Chalford. 
Sapperton Canal-tunnel, which \\as completed in 1789, showed, 
at the Stroud end, Fuller's Earth overlying Inferior Oolite. 
From the latter rock Rhynchonella spinosa and also Terebratula 
fimbria were obtained ; thus indicating that the Oolite Marl as 
well as the Ragstones were penetrated. Further on, a mass of 
Fuller's Earth was encountered, faulted against the Inferior 
Oolite on the Stroud side, and against the Great Oolite on the 
other side, and this latter rock continued until the end of the 
tunnel. Its length was 3,81 7 yards and ihe water-level was 363 
feet above sea-level. 
* See Geol. parts of Wilts and Gloucester, p. 10. 
