GEOLOGICAL SOCIETY OF LONDON. 14^) 
pressions of rain-drops and rippie-marks. The rain marks ap- 
pear as if the rain had been driven by a strong wind, and the 
direction of the impressions indicated that the wind blew from 
the westj a quarter from which violent squalls or thundergusts 
are still prevalent in these latitudes. 
January ISth, 1843. R. J. M urchison, Esq., President in 
the Chair ; a paper was read On the Silurian Rocks of the South 
of Westmoreland and North of Lancashire. By Daniel Sharp, 
Esq, E.G.S. vide (Geologist vol. 1. p, 122). 
This communication is in continuation of a paper read by the 
author on the 2nd of February, 1842, a second visit to the dis- 
trict having enabled him to correct some errors committed on 
his first examination, and to extend his observation into Lan- 
cashire. 
On both occasions Mr. Sharpe look for his base-line the 
bed of Coniston limestone described by Professor Sedgwickf, 
being convinced that Mr. Marshall has rightly considered that 
limestone as the lowest bed of the Silurian system in this dis- 
trict J, and in all his descriptions he adheres to the ascending 
order. 
1st. Coniston Limesto?ie. — It is doubtful whether this bed is 
continuous at its western extremity, or occurs only in detached 
patches. The two western portions of limestone at Water Blain 
and Low House are a mile and a quarter south of the bearing of 
the line of the bed east of the latter place, but are exactly on a 
line with the strike of the bed beyond Coniston ; a great fault 
between Low house and Graystone House being counterbalanced 
by the whole of the smaller faults between that spot and Coniston, 
which are pointed out in Professor SedgwicFs memoir. Mr. 
Sharpe gives a list of fossils collected in this bed and the shales 
above it at Torv.er Fell, Coniston, Long Sleddale, &c., in which 
are several of the species of OrthiSj Spirifer, and Leptcena, found 
t Geol. Trans. Second Series, vol. iv. p. 47. 
% Report of the British Associaton, 1839, Sections, p. 67. 
