Mr. Farey’s Notes on Mr. Bakewell’s Geology. 257 
P. 266, 1. 7, stone on he summit *.—* There are several sum- 
mits to this extensive hilly tract, the southern and many of 
the highest of these summits, are occupied by the oalite 
Limestone of New Malton, as described in your xxxixth 
vol. _p. 98, and the others northward, by Coal-measures 
of Danby-Dale, (P. M. xxxix. p. 100) or the Alum Shale 
from under them, probably answering to the Clunch Clay, 
Rep. i. 118, and P. M. xxxix.’p. 100 N ; and the same strata 
nowhere appear in Derbyshire, nor is it at all likely that they 
do so in Wharfdale, or other parts of the west Riding of 
Yorkshire. 
1. 17, fifteen miles in breadth +.—+ This is rather an in- 
correct description: the Alum Shale first rises on the Shore, 
SE of Stowbrow, at first rapidly, and then very easily, pur- 
sues the Coast NW (with local coverings of Red Alluvial 
Clay and Basalt Bolders, London Cherts, Flints, &c. &c.) 
turning some distance up each valley, before the Coal- 
measures close over it, all the way to Saltburn, a distance 
of 25 Miles; from hence the edge of the Alum Shale turns 
SW to near Whorlton and Osmotherly, a distance of 25 
“Miles more (making a length of 53 Miles, beset with Alum 
Works, ancient or modern), the Shale turning up the valleys 
as before, were the Coal-measures close over it: Barnaby- 
Moor NW of Gisborough, is also a large detached hum- 
mock of the Shale, I believe, but the breadth is nowhere 
considerable, of surface made by the Alum Shale, before the 
Coal-measures cover it :—unquestionably it underlies the 
whole of them. 
The Coal-field E and SE of Thirsk, has certainly the 
same measures, I think, as Danby-Dale, and therefore the 
edge of the Alum Shale may be expected to accompany it 
on the west, in proceeding SW and S from Osmotherly, and 
if it cannot be so traced? the great fault which I have sup- 
- posed to make an angle somewhere near Ainderby-Steeple, 
P. M. xxxix. p. 95, may account, why, in crossing a nearly 
fiat country partly covered by alluvium, I believe, from the 
Alum-Shale (or Clunch Clay?) at Osmotherly, to Leaming 
(mentioned in my Ist Letter, vol. xlii. p. 54), we see no 
strata, perhaps, until the Red Marl between the Yellow 
Lime Rocks is reached, and we miss all the thick strata of 
the middle of the Series in the south-east of England. 
Many whose knowledge of solid Geometry is scanty, and 
others who won't take the pains to study its application 
hereto (as | have done and explained in my Report i. 117), 
and others also, whose Theories tell them, that there is no 
law or regularity in stratification, and have but a slight 
Vol, 43, No. 192. April 1814. R know- 
