ME. PENGELLT ON THE LIGNITES AND 
1034 
Beds. 
Thickness. 
Totals. 
ft. 
in. 
ft. 
in. 
8 
8 
0 
52 
0 
Clay. 
9 
13 
0 
65 
0 
Sand. 
10 
7 
0 
72 
0 
Clay. 
11 
2 
72 
2 
Coal. 
12 
10 
73 
0 
Clay. 
13 
11 
0 
84 
0 
Blue Sand. 
14 
3 
0 
87 
0 
White Clay. 
15 
6 
87 
6 
Coaly Clay. 
16 
1 
6 
89 
0 
Sand. 
17 
10 
0 
99 
0 
Coaly Clay* 
I learu from the workmen, that the 13th bed of sand was “full of water,” like that 
encountered by Mr. Divett, and that it gave them great trouble by running into the 
boring whenever the instrument was withdrawn. 
The foregoing section is situated, from the first three, as nearly as possible in the 
dhection of the Strike of the formation. It has a depth about the same as the pit 
at its western end, where a vertical line cuts 27 “coal” beds having an aggregate 
thickness of nearly 36 feet ; instead of the solitary layer of 2 inches only in the Table 
just given. Those beds are known to exist, in unbroken continuity, along the enthe 
length of the western tunnel and the coal-pit, and onwards to the old engine-shaft, a 
distance of nearly half a mile ; here they suddenly cease and their place is supplied by a 
series of beds having the characteristics of the uppermost portion of the second division 
of the pit sections. The contrast of the two will be seen in Plate LIV. 
There can be no doubt that these facts are evidence of a great fault ; that the beds 
on the east of it are an upper portion of the Bovey deposit, preserved, through the 
intervention of a vertical displacement of at least 100 feet, from the denudmg action 
which swept it away on the west, after it had, by its pressm-e, assisted to flatten the 
timber in the uppermost stratum of lignite at present existing there ; and that this denu- 
dation occurred before the deposition of the “ Head,” since this is found covering the 
deposit alike, without considerable variation in its thickness, on each side of the 
fault” It will be understood that it is by no means intended to intimate that this is 
the only faidt in the Bovey formation; the occm'rence of beds of hgnite, near the 
sm’face, in various parts of the Heathfleld, renders it probable that there is, at least, 
another. Nor is it meant to express the opinion that the “ Head ” itself may not have 
lost much by denudation ; so far as they are at present understood, certain facts seem 
to imply that it may have sufiered much in this way. 
Though the neighbour-hood of Bovey was necessarily regarded as the head-quarters 
of the for-mation, it was felt to be desirable that some attention should be given to 
certain other localities, in various parts of the basin, where clay-pits exist. 
The clay-works at Aller, in the parish of Abb otsker swill, adjacent to the road from 
Torquay to Newton, and about two miles from the latter, have been abandoned some 
years. Lignite seems to have been found there in considerable quantity. Samples of 
* This section is exhibited in Plate LIV. (eastern section). 
