86 BASALTIC ROCKS, 
and these are of a very different character. They occur at Ingleton, 
on the line of the Craven fault, accompanied and much confused by 
an extraordinary mass of contorted slaty lamina*, which intervene 
between the slate quarries and the lower limestone range. The most 
distinct of the two, only a few feet wide, is to be seen projecting like a 
wall from the left bank of the stream, about one hundred yards below 
the slate quarry. The composition of the stone is remarkable and 
uncommon. It is a fine grained crystallized compound of red felspar, 
light colouied hornblende, and mica, -^—occasionally holding large masses 
of the same red felspar, with broad flakes of mica in them. It may 
as well be called hornblendic granite, or micaceous syenite, as green- 
stone ; I found a loose fragment of the same rock in Knock pike 
(1827), and it appears probable that further researches may shew a 
closer connexion than can be proved at present between the dykes 
of Ingleton, and Knock pike, and the granitic mass on the north- 
west side of Dufton pike. 
Bun Lime .— The peculiar condition of the limestone expressed 
by this name has been already explained, p. Limestone in this 
condition occurs under the following circumstances principally. First 
along the lines of fault or disturbed stratification as near Kettlewell 
along the Craven fault near Ingleton, in the ‘ rearing beds’ of Pendle 
hill’ an ^ part of Bolland. The best exhibition that I am acquainted 
with is on the southern end of Twisselton scar, where at a small 
anticlinal axis, north of and parallel to the Craven fault, dun lime- 
stone beds, thirty yards in thickness, stand vertical. Secondly, along 
the line of a vein, as below Middleton, on the banks of the Tees, 
and near Kettlewell. Thirdly, in the lower part of the limestone 
series, as in particular about Brough, and in the valley of the Gelt. 
This state of the limestone does not appear to be dependent on the 
proximity of igneous rocks, for it scarcely occurs near the Whin sill 
of Teesdale ; but appears to be definitely connected with the lines of 
dislocation of strata, and may be plausibly referred to some chemical 
or electrical agencies developed along these lines. 
