312 
LOWER OOLI1IC ROCKS OF ENGLAND : 
marl?, which are very fossiliferous in places ; yielding NeriruRa 
Eudesi, Astartc angulata, Ostrea Sowerbyi, Tcrebratula maxillata 
and Corals. Further reference will be made to these beds. 
The following is the section of a shaft at Stouesfield, recorded 
in 1827 by Fitton : * 
^3 OQ 
6! 
f Bubbly limestone -") 
Clay with Terebmtula maxillata, Rhynchonella cibso- \ 
leta, Pecten fibrosus .... 
" BOCK ": limestone - 
g w ^, Blue Clay 
8 & I "BocK": oolite 
5 a. | Blue or greenish clay ; it effervesces slightly with 
fe. (__ acids, and falls to pieces in water like fuller's earth 
*BAG": oolitic limestone, fine-grained, with casts of 
spiral univalves and bivalves ; and coarse soft calca- 
reous stone, more or less oolitic [forming the roof 
of the drift or horizontal gallery where the slate 
is dug] - - - 
f " SOFT-STUFF," yellowish very sandy 
clay, including thin courses of fibrous 
gypsum 
" UPPER HEAD," composed of sand, of 
various consistency and fineness of 
grain, containing towards the lower 
part large flat spheroidal concretions 
(called "Pot-lids"), of calcareous 
grit, pervaded by oolitic particles, 
these pot-lids furnish the best stone; 
the rock, with all the other useful 
stone of the pits, bears the common 
name of " Pendle." It includes 
pebbles of hard sparry oolitic stonef 
1 3 to 
" MANUKE " or " BACE," slaty friable 
sand-rock, calcareous and micaceous 
" CAP " and " LOWEB HEAD " ; the 
upper portion having a concretional 
form like that of the Pot-lids. The 
rock in both cases varies, from a 
very compact and fine-grained grit, 
effervescing strongly with acids, to a 
stone of which the larger portion 
consists of oolitic particles. The 
greater number of fossils, including 
Mammalian remains, Trigonia im- 
pressa, Rhynchonella obsoleta, &c. 
appear to have been procured from 
these beds - 1 6 to 
" BOTTOM-STUFF." Coarser calcareous 
grit, with oolitic particles [base not 
seen] - 
' 
IT 
^0 
"no 
*P 
ts 
1 
Stonesfield 
Beds. 
5 ft. 3 in. to ^ 
~S 
6ft. 

O 
1 

FT. IN. 
32 
5 
- 25 
6- 
2 

The Stonesfield Slate has yielded a rich and interesting suite of 
fossils, and specimens may now be obtained from the spoil-heaps, 
from the " slatters '' who keep at their cottages numerous 
or 
specimens for sale. 
* Zool. Journal, vol. iii. 1828, p. 412 ; Owen's Palaeontology, p. 307, and ed. 2, 
p. 344. See also Conybeare and Phillips, Geol. Kng. and Wales, pp. 203, &c. 
f In the Museum of Practical Geology there is a small slab of oolitic Stonesfield 
Slate, with a vein of calc-spar that traverses the rock, and also an included pebble. 
