THE JURASSIC DEPOSITS WHICH UNDERLIE LONDON. 763 
so great a height as 130 ft. from the surface, he should expect the 
outcrop to be on ground of considerable height. 
Mr. Erurriner said that few more important papers had been 
read before the Society. Our knowledge of the subterranean 
geology of the south-eastern and middle part of England had been 
greatly augmented of late, especially by borings near Northampton, 
the results of which would before long be brought before the Society. 
The great gap that existed in the London area between the Creta- 
ceous and the Paleozoic rocks was remarkable. The discovery of 
Jurassic rocks and fossils in this Richmond area was important, as 
linking the British to the French area, the boring at Battle serving 
as a connecting link. As regards the Meux’s Brewery, he felt con- 
vinced that the upper and sandy part of the so-called Neocomian 
was certainly of that age; of the lower part it was more doubtful. 
Trigonma alefornis and Astarte formosa occurred in the upper part, 
with one or two other distinctly Neocomian fossils. Of the occur- 
rence of Devonian there and at Turnford there is no doubt. nor of 
the Wenlock at Ware. These dipped towards the south. He hoped 
that at Richmond they would attempt to reach something below the 
red beds, so as to prove the presence of undoubted Paleozoic rocks. 
There was no doubt, however, that the Great Oolite and Bradford 
Clay are represented in the boring. 
Mr. Torey called attention to some specimens from the Kentish- 
town boring exhibited by permission of the Director-General, and 
some from Meux’s boring. Recent examination of the latter had 
produced some evidence corroborative of Prof. Judd’s view as to their 
Oolitic age, at any rate in part. As regards the occurrence of coal, 
he drew attention to the boulder of coal found in the Chalk near 
Dover, which was not anthracite. If the red rocks were not New 
Red, he hardly saw how they could be Old Red, as so near the beds 
had a true Devonian facies. He also called attention to a well at 
Chatham Dockyard, which had passed through 30 ft. of Folke- 
stone beds, 9 ft. of Atherfield (?), and then, as he believed, Wealden 
beds. He thought all the evidence now brought forward by Prof. 
Judd showed that the boring in the Weald had been wisely aban- 
doned. He also called attention to Prof. Judd’s diagrams as illus- 
trating the connexion between the thinning out of lower beds and the 
dip of the overlying beds, the latter being explicable by the former. 
Prof. Hugues remarked that the compressibility of newer beds 
abutting against uncompressible older beds, by causing a dip away 
from the axis, would be another explanation of the amount of 
apparent dip of the same kind as that which Mr. Topley had last 
mentioned. . He agreed with Prof. Prestwich in doubting whether 
the red beds were Trias. The base of the Oolite showed that the 
materials had come from some distance, and the Lias and Rheetic 
were wanting. Nowhere else did an unconformity so marked occur 
between Oolitic and Trias, and he thought it could not be inferred 
from the results of one boring. Also the finer beds generally 
occurred high in the Trias, and he should expect to find coarse beds 
in the lower or shore-deposits. 
