82 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 
(7.) The formation of the existing lakes must have been one of 
the last of the series of these geological events, for it is manifest that 
they could not be formed till the valleys themselves had been scooped 
out. Their formation must also have been accompanied with con- 
siderable movements, as already shown (Art. 8), producing displace- 
ments along the former lines of fracture ; a circumstance which justi- 
fies the supposition that such movements may have frequently oc- 
curred during the progressive formation of the valleys, should ob- 
served phenomena seem to render such an hypothesis necessary. 
§ Theory of the Elevation of the District. 
12. If we conceive the surface of junction of the mountain lime- 
stone and older formations to be continued, precisely as in Article 5, 
over the central portion of our district, the elevation of this imagimary 
surface will represent that geological elevation* which has given to 
the district its general external configuration, independently of local 
irregularities. This surface, if seen from a point sufficiently distant 
on the west, would present the appearance of a flat dome; and if 
seen from the south, its outline would resemble that of the annexed 
diagram, which represents a section along the axis of the district from 
Fig. 10. 
Kirkstone Fell. Lune valley. Howegil Fell. 
W.N.W. to E.S.E. Also the form of the area of the district bears a 
general resemblance to that of the following diagram ; and the dip o¢ 
our imaginary stratum will be as ree nn 
presented at each point by the ar- we s Re 
rows. The tendency of this dip Peter ape: uf ae 
between Kirkstone Fell and the val- / welt ere * 
ley of the Lune, towards the N.E. ! gre 
on the north of the axis, and to the i 
east of south on the south of the 
axis, 1s owing to a declination in the — | 
axis itself from Kirkstone Fell to the 
valley of the Lune, as represented in 
the former of these diagrams. This, ' 
combined with the dip perpendicular : _= vee as 
: : 
\ 
\ 
\ 
{ 
: 
See 
to the axis, produces that represented 
in the figure. 
It must be recollected that the dip 
of the imaginary stratum here de- 
scribed is altogether independent of 
the unconformable stratification of 
the grauwacké group, but would co- aneng 
incide with the mean dip of the Bere = 
mountain limestone, independently Great limestone fault. 
* T speak of geological elevation (as I have elsewhere defined it) as the elevation 
above its undisturbed horizontal position, of any stratum, of which the continuity 
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