1200 feet.) 
7 inch 
vertical scale: 
{4 inches == 1 mile ; 
ontal scale : 
( Hori 
Section from the River Awe to Lyme Regis. 
Thicknesses in feet. 
. Between 160 and 170 
Up to 180 
Selbornian ...... 
Chalk 
Hs 
Sc 
on 
os 
<—© 
O 
w = 
adn 
cw 
oc : 
35 G 
60 2 
Q co 
qa = = 
nOoOmM 
ae iS 
oe oF 
aN = 
td 
S) 
te SS 
= =| 
O : 
fi ek See, Z 
[o) . 
mo) : 
= . 
faa} . 
Oi a 
o~ 
= 8 w 
_ O24 5 
4 
ll Il 
mN 
Hav ai Cliff 
II, Dxscriprion oF THE Coast- 
SECTION, 
Before describing the succession 
which was actually found in the 
boring, it will be useful to give a 
brief account of the strata which are 
seen in the cliffs, more especially as 
the exposures of the Rhetic Beds have 
never yet been fully described. The 
Liassic Beds have been dealt with in 
full detail by Mr. H. B. Woodward’; 
and the Keuper Marls and Sandstones 
have been described by Mr. Ussher, 
the Rev. A. Irving, and Prof. Hull, in 
the Quarterly Journal of the Geological 
Society. 
The Rhetic Beds were briefly de- 
scribed by Thomas Wright in 1864,” 
and Mr. H. B. Woodward published 
notes on the exposures at Pinhay Bay 
and near Culverhole Point in 1885 and 
1899 *; but no details of the exposures 
in Charton Bay have yet been printed. 
Mr. Woodward examined these loca- 
lities in 1884, and has been kind 
enough to place his notes and mea- 
surements of them at my disposal. 
The Blue Lias. 
Starting from Lyme Regis, we find 
the *‘ West Cliff’ composed of dark 
shales in the upper part, and of an 
alternating series of limestones and 
shaly clays in the lower part. The 
latter group is known as the Blue 
lias, and is quarried at the Cement 
Works, as well as at Uplyme. Its 
thickness, according to Mr. Woodward, 
is about 105 feet, and it forms the 
base of the cliffs westward as far as 
Pinhay Bay. This group is divisible 
into four zones, as follows, in de- 
scending order :— 
1 Mem. Geol. Surv.*‘ The Jurassic Rocks 
of Britain’ vol. iii (1893). 
2 Geol. Mag. vol. i (1864) p. 290. 
3 Proc. Geol. Assoc. vol. xi (1889) p. xxx, 
& vol. xvi (1899) p. 135. 
