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The THIRD division - forming only inferior elevations - commences
with a bed of dark-blue or blackish transition limestone,
containing here and there a few shells and madrepores, and
alternating with a slaty rock of the same colour; the different
layers of each being in some places several feet, in others only
a few inches in thickness. This limestone crosses the river
Duddon near Broughton; passing Broughton Mills it runs in a
north-east direction through Torver, by the foot of the Old Man
mountain, and appears near Low Yewdale and Yew Tree. Here it
makes a considerable slip to the eastward, after which it ranges
past the Tarns upon the hills above Borwick Ground; and
stretching through Skelwith, it crosses the head of Windermere
near Low Wood Inn. Then passing above Dovenest and Skelgill, it
traverses the vales of Troutbeck, Kentmere, and Long Sleddale;
crossing the two intervening mountains in the direction of the
roads which lead over them; so that no relation can be discovered
between the direction of the vallies and that of the
stratification. It dips to the south-east, while the cleavage of
the slate with which it is associated, frequently inclines in an
opposite direction.
Towards the south-east succeeds a series of rocks of the same
dark-blue colour, and principally of a slaty structure: but
accompanied in places with a rock, which breaks alike in all
directions. This last has supplied a great portion of the rounded
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