Forest 
Great Oolite Marble 
58 
PROCEEDINGS COTTESWOLD CLUB 
1915 
DESCRIPTION OF THE ROCKS PASSED THROUGH BY THE 
BORE-HOLE AT THE WATERWORKS, TETBURY. 
Ground-level. — 447 feet above ordnance-datum. 
Shaft. — 9 ft. 6 ins. deep. 
iS-inch rotary boring. — 147 ft. 3 ins. 
^ yinch rotary boring.— 2g8 ft. 9 ins. 
total depth. — 446 ft. 
I 
/ n shaft : i. Typical Forest-Marble limestones 
with numerous specimens of Ostrea sower- 
byi Lyc. and, on weathered surfaces, small 
gastropods, etc. 
Bore-hole : 2. Similar limestones in thin 
layers with partings of brown clay 
3. Very similar, but less shelly limestones, with 
small “ clay galls ” 
4. Limestone, brownish, oolitic 
5. Sand — according to the foreman 
6. Limestones, brownish-grey, coarsely oolitic, 
with few shells, but on the nether side of 
lowest bed were noticed Ostrea sowerbyi 
Lyc., EtUolium deniissum (Phil.) and echi- 
noid-radioles. Wood in places . . 
Marl, brown 
Limestone, grey, oolitic 
Clay, tough, brown and greenish-grey 
Limestone, brownish, oolitic, somewhat re- 
sembling certain of the browner and less 
shelly layers in the true Forest Marble, 
with occasional small flat “ clay galls ” 
Limestone 
Limestones in thin layers with clay partings 
Limestone : shell fragments in places 
Clay, brown 
Limestone, similar to 13 
Limestone, impure, oolitic, with which is asso- 
ciated a considerable amount of brownish 
marl, especially at the top and bottom . . 
Limestone, with irregular surface, “ cavern- 
ous,” the cavities being occupied by 
brownish marl 
Great Oolite Limestones. 18. Limestone 
Limestone, non-oolitic, cream-coloured but 
ivith a pinkish tinge {Spec. 19') . . 
Limestone, yellowish, oolitic (except in places 
in the top portion), with more or less 
vertical veins of calcite . . 
Limestone, very similar to 19 
a. Limestones, oolitic, massive-bedded. Some ^ 
of the beds have irregular nether surfaces 
and tough brown clay (o to 2 ins. thick) 
between them. The beds are traversed 
by thin more or less vertical veins of cal- 
cite : about 39 ft. 3 ins . . 
b. “ Dagham Stone ” : about 9 ins. . . 
c. Limestones, oolitic massive-bedded, about 
23 ft. 5 ins. 
7 
8 
9 
10 
II 
12, 
13 
14 
15 
16, 
19, 
20. 
21. 
22 
Thickuusb of 
rocks 
ft. ins. 
9 
8 
2 
2 
12 
3 
I 
I 
I 
I 
I 
0 
1 
4 
I 
6 
3 
6 
o 
o 
o 
6 
4 
9 
2 
6 
I 
6 
o 
6 
7 
o 
6 
Depth 
ft. ins. 
9 6 
17 9 
3 
23 3 
25 6 
37 h 
40 6 
42 o 
42 2 
43 6 
45 3 
46 5 
47 II 
48 o 
49 6 
51 6 
53 
54 
56 
60 
61 
o 
7 
I 
7 
►63 5 125 o 
The specimens referred to in brackets have been placed in the Cheltenhani Town Museum. 
