Mr. Farey’s Reply to Mr. Bakewell—Fault in Derbys. 105 
and the strata being with him, all alike in kind (I will 
advert to their inclinations presently), my Fault is again 
unnecessary, to account for their being of different kinds. 
Mr. &. seems, on the same principle, to have been very 
cautious against mentioning anything about the sudden 
terminatidn of the Yorkshire and Derbyshire Coal-field * 
against Red Marl, from Wollaton to Bredsall, as I have 
shown it, and merely says at p. 267, ‘* Coal strata terminate 
a few miles north-east of Derby:” well knowing, that no 
Anglo-Wernerian or Bakewellian confounding of names and 
terms, could enable him to persuade his practical readers, 
that Recd-Marl and Coal-measures are identical. And so of 
the 4th Limestone Rock of the Weaver Hills, abutting on 
the same Marl. 
It is true that Mr. B. p. 176, doubts the identity of this 
Marl. carried forwards into Cheshire, as I have stated, in 
confirmation of this great Fault, Rep. i. 147 :—and why? 
because Mr. Holland found ‘no Shells” (p. 176) in the 
Mar! covering the Gypsum in Cheshire, (p. 138), and he 
(Mr. B. p. 175) saw several shells and other organic re- 
mains, in the * Marl and gravel” covering the Chellaston 
Gypsum. Had, however, Mr. B. been sufficiently versed 
in the first and most important principle of the Smithian 
School, for accurately discriminating between the alluvium 
and the strata (Rep. 1. 109), and had imbibed none of the 
Anglo-Wernerian errors alluded to in page 134 of my Re- 
port, be would have avoided this mistake, and seen, as I had 
stated, Rep. i. 136 and 149, that all the extraneous fossils 
which he mentions at Chellaston, are lodged in adluviad 
Clay, similar to that of Bedfordshire, and that the Red 
Marl holds no rediquia there, or in any other known situa- 
tion. I twice visited the Chellaston Pits, once in company 
with Mr. B’s Friend whom he mentions or alludes to, [ 
believe, pages 189 and 282, &c. and each time made a col- 
lection of the Reliquia which Mr. B. mentions, and others, 
from the alluvial covering of the Gypsum and Marl. 
Mr. B. asks of me p. 46, what the great Derbyshire 
* In several instances Mr. B. mentions or intimates that Coal-fields are 
* cut off” by Red Sandstone, &c. pages 134, 273, 267, 268 and 142, but has 
nowhere attempted the definition of this term which is so variously and 
Joosely applied by great numbers of practical Men, as well as by himself: 
and in p. 274, he is equally silent on the meaning of his expression ‘ excludes 
the Coal.” lbeg to say, that I know, either in theory or practice, of no 
cutting off, or abrupt termination to any regular strata, but particularly 
Coal-measures, except by Basseting, or Faults and Dykes; and know, that 
Coal-seams, &c. frequently basset or terminate suddenly against Gravel or 
other heterogeneous matters, licing on the surface, or in Faults which inter- 
ct the strata, 
4: Fault 
