10 SKETCH OF THE GEOLOGY OF DERBYSHIRE. 
rather N.E. as may be seen by the examination of the tunnel of the 
North Midland Railway; and it no doubt preserves the same dip, as 
it crosses the Derwent, and runs below Little Eaton to Breadsall. 
In Breadsall brook it may be seen greatly disturbed, no less than ten 
changes of dip occurring within about +m. the angles of inclination 
varying from 20° to a complete perpendicular. At Breadsall it be- 
comes concealed by the newred sandstone. Crossing to the W. side 
of the valley that comes down from Wirksworth to Duffield, the shale 
may occasionally be seen dipping rapidly to the W. more especially 
about Ideridge Hay, and thence to Wirksworth. In the small valley 
that runs down from below Wirksworth to Hopton, the shale dips to 
the S. and the effect of this depression to the W. and S. is, to bring 
in a patch of gritstone resting upon it about Kirk Jreton. From un- 
derneath this, however, it soon rises again with a dip towards the N. 
and this is continued till the lower beds appear at Flower Lillies, near 
Turnditch, all beyond this is obscured by new red sandstone and dilu- 
vium ; but we get the upper beds again, where it alternates with the 
gritstone, within the boundaries of the new red sandstone, at the back 
of the Royal Oak at Langley.* Here, likewise, it dips to the N.E. 
at an angle of 15°; so that one or two changes, and probably some 
faults, must be concealed by the overlying beds between here and 
Turnditch. On tracing the shale to the W. we find it between Atlow 
and Kniveton, rising up into a round hill of very considerable eleva- 
tion, called Atlow Winn, at the S. end of which, at a place called 
Agnis Meadow, beds the same as those of Turnditch are worked for 
their limestone, and the most extraordinary twistings and contortions 
of the strata are exposed. Even the solid beds of limestone are bent 
into regular curves, and bear the appearance of arched masonry. Its 
general dip here appears to be towards the S., whence it shortly gets 
concealed by the new red sandstone. A quarry, apparently in beds 
similar to these, was formerly worked at Wild Park, near Brailsford, 
but no face is now exposed to give us any information as to the posi- 
tion of the strata. From Agnis Meadow it lies pretty level all the 
way to Ashbourne, but at Ashbourne Green it dips 30° N.E. and 
immediately beyond is concealed by new red sandstone. 
* In speaking of the “ red and white sandstone,” in the former part of this 
paper, I believed, from some detached specimens I had seen, and from its 
position within the borders of that formation, that this quarry belonged to it. 
On seeing the quarry itself, however, it was immediately evident that the 
beds belonged to the upper part of the limestone shale, or lower part of the 
millstone grit. Horizontal new red sandstone may be seen in the road close 
behind it. 
