294 
THE GEOLOGIST. 
at present goes, the faunae of the!=e three localities may be considered 
as nearly, if not completely identical. 
Ruditz and Kausnitz also, separated only by a distance of three 
Austrian (between fourteen and fifteen English) miles, possess in com- 
mon only two species of Gasteropods. E-uditz is one of the highest 
fossiliferous localities in the Vienna basin, lying about 1400 feet above 
the level of the Adriatic. Leitha limestone and the sandstones con- 
nected with it, appear only as isolated but well-characterized hills, 
rising above the surrounding plain. 
Four subdivisions may be distinguished within the diluvium of the 
region here in question : — 1st, Erratic blocks and boulders ; 2nd, In- 
ferior loam (Loss) ; 3rd, Terraced detritus ; and 4tli, Upper or valley 
loam (Loss). 
PROCEEDINGS OF GEOLOGICAL SOCIETIES. 
Geological Society of London. — April 2^, 1S61. 
1. "On the 'Svmou Fault' in the Coalbrook Dale Coal-lield." By Marcus 
W. T. Scott, Esq."; F.G.S. 
This communication was based on observations made during many years on 
a section through a part of the Shropshire Coal-field in nearly a straight line 
from north to south, commencing at the Greyhound Pit, near Oakengates 
Tunnel of the Shrewsbury and Birmingham Railway, and terminating at John 
Anstice and Co.'s Halesfield Pits near Madely. Particular reference was made 
to the explanation of the nature of the Great East or Symon Fault. The 
author commenced making his observations on the Mahuslee and Stirchlee 
Royalties in 1843 ; and in 1845 he came to the conclusion that what the miners 
termed in this locality Ihe " Symon Fault," that is the successive dying out of 
certain coal-seams, ironstones, &c., at various depths underground, was due to 
an old denudation which had produced an inclined surface at the expense of 
some of the beds before the upper measures were deposited. Having obtained, 
in course of time, correct sections of several pits situated in the N. — S. line 
above mentioned, the author, taking the " Little Flint" (the lowest workable 
coal) as a base-line, plotted the several shifted segments of the coal-field in a 
vertical plan, and thus restored the original outline of the denuded area (one 
side of a valley) as seen in a transverse section. Six sinkings in the N. — S. 
line having indicated the successive disappearance of five workable coal-beds 
in a distance of 2484 yards, a seventh pit, 2000 yards further south, was found 
to yield all the coals again, and the author thinks that between the sixth (the 
Grange) and the seventh (Halesfield) pit the coals re-occur successively on the 
opposite side of the old valley of denudation, and that they may here be sought 
for and worked advantageously. The line of the old valley of denudation 
apparently strikes the Great East fault, as laid down on the Geological Survey 
Map, at a considerable angle. 
2. " On the Occurrence of Cyrena fiuminalis associated with Marine Shells 
in Sand and Gravel above the Boulder- clay at Kelsey Hill near Hull." By 
Joseph Prestvrich, Esq., F.R.S., Treas. G. S., &c. 
The author's observations tended to show that the Cijrena fiuminalis, instead 
of being limited, in its occurrence, to beds beneath the Boulder-clay (under 
which circumstance it is found in Norfolk), occurs in deposits of newer date ; 
and that the argument, that the well-known beds at Grays, in Essex, are older 
than the Boulder-clay, depending much on the presence of this sheU, would 
