PROCEEDINGS 
OF 
THE GEOLOGICAL SOCIETY OF LONDON. 
Vou. III. Parr II. 1840—1841. No. 73. 
Dec. 16.—Edward Kater, Esq., F.R.S., Mexborough, Yorkshire ; 
and Sir Francis Shuckburgh, Bart., the Pavilion, Hans-place, Sloane- 
street, and of Shuckburgh, near Daventry, were elected Fellows of 
this Society. ' 
A paper “‘ On the Relative Connection of the Eastern and West- 
~ ern Chalk Denudations,” by P. J. Martin, Esq., F.G.S., was read. 
The author advances this as the first of a series of papers on the 
construction of that part of the country usually considered as 
- appertaining to the great chalk denudation of the Weald, or more 
properly, the upburst of the secondary formations between the 
tertiary of the respective basins of I.ondon and Hampshire. 
In venturing on this field of inquiry, he professes also to take up 
the subject where it was left by him in two former memoirs, one 
published in 1828 under the title of a‘ Geological Memoir of Western 
Sussex, with some Observations on Chalk Basins and the Weald 
Denudation,’ the other in the ‘ Philosophical Magazine’ for Fe- 
bruary 1829; and to extend the number of demonstrative facts that 
bear upon the theory of denudation by disruptive violence and con- 
temporaneous aqueous abrasion, there brought forward as a corollary 
to Dr. Buckland’s theory of ‘ Valleys of Elevation.’ 
In pursuance of this object, he begins by an examination into the 
arrangement of the great chalk dome of Hampshire and Wiltshire,— 
the Patria of the chalk of Pennant and Conybeare; its anticlinal 
lines of disturbance or upheaval, and their connections with those 
of the Weald and the smaller western denudations of Pewsey, War- 
dour and Warminster. 
He finds that six great anticlinal lines are the main instruments 
of the upbearing of this abraded chalk; that the three which 
characterize the smaller anticlinal western valleys are projected 
onward, and in a manner decussate three others which emanate 
from the western extremity of the greater valley of the Weald, the 
vale of Wolmar Forest, from whence he starts his inquiry ; and that 
these lines do not inosculate or enter into each other ; approximat- 
ing, indeed, but little in any part of their course ; severally dying 
out, and their respective synclinal lines playing off into each other. 
Their course is rather irregular, and their force exceedingly varia- 
ble; but their general parallelism is maintained throughout, their 
progress being E. and W., with a point to the N. 
/ VOL. III,—PART II. 2F 
