FOREST MARBLE: LONDON. 
361 
Prof. Prestwich noticed that at depths of from 1,000 to 1,064 feet 
the bore-hole " passed into a rock having the appearance of an 
oolite, being composed of a fine calcareous grit in a calcareous 
paste." Charles Moore also noticed " intercalated beds of oolitic 
limestone, which, but for their density, might have passed for 
great deposits of Oolite." Nevertheless the fossils were considered 
to indicate the Lower Greensand.* Moore likewise identified 
small grains of coal in the basement-beds. 
The details of this boring (1,000 to 1,064 feet) may be sum- 
marized as follows : 
Forest Marble, 
Bradford Clay, j 
and 
Great Oolite. 
Light-coloured limestone 
Seam of quartzite pebbles 
Sandy limestone 
Light-coloured limestone, with traces 
of fossils 
Marly sand 
Light-grey limestone, with numerous 
fossils - 
Light-grey oolitic-looking rock 
Bubbly stone and clay - - . 
FT. IN. 
64 
Prof. Judd (who subsequently examined the specimens) remarked 
that bands of marl apparently alternated with the more solid beds 
of oolitic limestone ; and among the fossils, he was able to identify 
Terebratitla maxillata, Waldheimia digona, Cidaris bradfordensis, 
Acrosalenia, Polyzoa, and many other specimens, showing 
that the same beds met with at Richmond were present under 
London. f He thought that some of the coaly fragments might 
possibly have been derived from layers in the Jurassic beds ; 
but he has noted the occurrence of anthracite and pebbles of 
Coal-measure sandstone, in the basement-beds of the Great Oolite 
at Richmond. 
In 1882 a deep boring for the Southwark and Vauxhall Water 
Company, was commenced near the rail way- station on Streatham 
Common, Surrey. After passing through Tertiary and Cretaceous 
strata to a depth of 1,081 feet 6 inches (the lowest bed then 
reached being Gault), the bore-hole penetrated beds belonging to 
the Great Oolite Series : a fact announced by Mr. Whitaker, in 
1888.J After passing through 38 feet 6 inches of flat-bedded 
Oolitic strata, red rocks of the character of Old Red Sandstone 
were entered, and these older rocks appeared to dip at angles of 
20 to 30. 
The following details of the Oolitic strata are abbreviated from 
those recorded by Mr. Whitaker, from information furnished by 
Mr. J. W. Restler, and from notes made by Mr. E. T. Newton : 
* Quart. Journ. Geol. Soc., vol. xxxiv. pp. 912, 915, 916. 
t Ibid., vol. xl. p. 745. 
j Rep. Brit. Assoc. for 1888, p. 656 ; Geology of London, vol. ii. p. 226. 
