603 
2. Blue Flagstone Rock.—The shales of the last deposit pass up- 
wards into a dark blue flagstone, the strike of which is parallel 
to that of the Coniston limestone, and the dip is conformable. It 
is stated to range from the west of Coniston by the village of 
Torver, the head of Coniston Lake, also south of the Ambleside 
road to Low Wray, and thence from the east side of Windermere, 
by Trout Beck and Kentmere, to the neighbourhood of the Shap 
granite. The faults which affected the Coniston limestone series 
extend into this deposit. No organic remains were found by the 
author, but he is of opinion that their absence may be owing to the 
rearrangement of the constituent particles of the rock when they 
assumed the slaty structure. 
3. Windermere Rocks.—This vast series of beds, to which Mr. 
Marshall applied the name of Blawith slate, succeeds conformably 
to the blue flagstone, and is arranged by the author into three 
groups, which he calls the lowest, middle, and upper divisions. A 
line drawn from Coniston Water Head to Lindale, a distance of 
twelve miles, would cross the beds at right angles to the strike ; and 
though the same strata are, according to the author, frequently re- 
peated in a succession of parallel anticlinal ridges, yet he is of opinion 
that the total thickness of the formation exceeds 5000 feet. 
3a. Lowest Division.—This portion of the Windermere rocks con- 
sists of gray schistose grits and argillaceous slates, containing thin 
beds of limestone on the banks of Coniston Lake. The strata are 
stated to be much affected by cleavage lines. The usual strike of 
the beds at the foot of Coniston is said to be north-east, but great 
variations are shown to occur in other portions of the district, in con- 
sequence of anticlinal ridges which range north and south. The 
boundary between this division and the middle one passes from the 
foot of Coniston Water to the ferry on Windermere, and thence by 
the foot of the valley of Kentmere, across Long Sleddale at Murth- 
waite Crag, south of Tebay Fell, Langdale Fell and Ravenstone Fell, 
to Rathay Bridge, but it is much affected by dislocations. The general 
range of the division, Mr. Sharpe states, may be traced by the grits 
and slates forming a series of bold hills which stand out in relief 
above the tame rounded masses of the argillaceous schists of the 
middle division. 
The author alludes to a band of calcareous slates shown by Prof. 
Sedgwick to range from Blawith to the south-west, but he states that 
he failed to find its eastern continuation ; he alludes likewise to Mr. 
Marshall’s account of having found lower Silurian fossils in it; and 
he is induced, on this account, to conceive that the calcareous band 
may form the uppermost portion of the lower Silurian rocks. The 
lowest division of the Windermere series is stated to be well exposed 
on the shores of Coniston Lake. 
3b. Middle Division.—This deposit consists of read argillaceous 
rocks, usually striped or banded gray, blue, or white, and sometimes 
brown; it contains also beds of soft shale and hard grits similar to 
those of the lowest division. On the west side of Windermere the 
usual strike is north-east, but to the eastward of the lake the strata 
