104 Mr. Farey’s Reply to Mr, Bakewell—Faults in Derbys. 
masses of Gypsum, Rock-salt, Gritstone, Slate, &c.) Mr. 
B. has chosen, after the manner of the Anglo- Wernerians 
(which he often affects so much to despise), to substitute the 
term ‘¢ red Sandstone,”’ pp. 134, 136, 174 N, 196, 267, 268, 
273 and 274 ; and ‘‘Sandstone,” pp. 285 and 286. So care- 
ful does Mr. B. seem, against the use of the term Marl 
for these strata, that except when used for marling in Lan- 
cashire, p. 196,o0r occurring as the covering of Gypsum, 
pp- 173, 175 and 176, it scarcely occurs 3 even in describing 
the Cheshire Salt strata, ‘<argillaceous stone” is substitute 
for it, p.137. In your xxxixth volume, p. 470, your re- 
porter has made Mr. B. speak more diffidently, on the iden- 
tity of this ‘* dark-brown Shale” with the Cheshire ‘* red 
sand rock.” 
In this manner, having obtained a common term (sand- 
stone) for strata so dissimilar and distant in the series as 
Red Marl and Limestone Shale, as * a simple arrangement 
suited to the present state of our (his) knowledge” (p. x), 
Mr. B piainly insinuates, at pages-134 and 135, that these, 
the Red Marl and the great Shale and ist Grit, form one 
and the same stratum, and in p. 136 thus expresses him- 
self, “if the identity of the ved sandstone and the Grit aud 
Shale be admitted, a greater similarity will be established 
between the lower series of the strata in England, with 
those in various parts of Germany from whence Werner 
has formed his arrangement.” 
Here then I discovered at once the reason, for Mr. B’s 
anxiety to disprove the existence of my great Derbyshire 
Fault, and his facilities for so doing, at least in those parts 
between Allestry and Wooton, and W of Ramsor, (see 
the Map at p. 97 of my Report, wherein I have shown, ag 
the result of a very laborious and careful examination of all 
the surface, that Red Marl occupies the south ‘side and 
Limestone-shale the north side of this precise Line, of the 
Fault, where Gravel does not conceal this line :—but, an- 
swers Mr. B., since in m2 language these strata are the 
same. your Fault is unnecessary and “ imaginary.” 
That I do not misrepresent Mr. B. in these inferences, 
will more clearly appear, from p. 212 of his Geology, 
wherein he refers to the Gravel Rock north of the Fault at 
Nottingham, calling it “Sand Rock,” and to the Strata at 
uddington Hill, and in the intervening vale south of the 
Fault, and conceals the fact (if he knew it?) that these 
strata south of the Fault are Red Marl and not Gravel or 
Sand Rock: as might from his description be supposed 3 
: an 
