ROCKS OF SHROPSHIRE. 657 
Sandstone plunging towards the latter. Fig 6 illustrates this 
arrangement. 
I believe the junctions of these flanking rocks to be faults in each 
case, the masses being sliced out of more extensive formations. 
These slices rapidly thin out towards the south-west, so that Caradoc 
sandstones gradually approach the axis, and, under the summit of 
the hill, they rest against it. Fig. 7 represents the relations of 
the flanking rocks at the south-west end of the mountain. 
Fig. 6.—Section across Little Caradoc and valley to the South-east. 
(Length of Section about half a mile.) 
N.. 8.E. 
aK 
Bee ly Pee NNN 
ow fae eo XS 
See f/f NS 
it Ce 
lol 
Faults. 
a. Greenstone of Little Caradoc. b. Quartzite. ¢. Hollybush Sandstone. 
d. Tremadoc (Shineton Shales). e. Caradoc. 
Fig. 7.—Section across Caer Caradoc towards its South-west end. 
(Length of Section about 1 mile.) 
N.W. S.E. 
EX 
Pax y{ —<$ 
So eae Sy < ~ 
eee eo SS SS SSS 
EE IU.- -OWSNSNSN 
a aw WG MEAT RT POO OR RTE 
Fault. 
a. Precambrian Rocks. 6. Longmynd Slates. 
c. Caradoc Sandstone, d. Intrusive Dolerite. 
Summary.—Caer Caradoc is a wedge of rock limited by faults 
striking 8.W., composed of felspathic grits, felstones, ashy shales, and 
indurated claystones, which are locally disturbed by several pro~ 
trusions of greenstone arranged in a line along the axis. On the 
N.W. the hill is bounded partly by Wenlock limestone and shale, 
and partly by Longmynd slates ; on the S.E. by quartzite, succeeded 
by Hollybush Sandstone and Tremadoc Shales at the N.E. end, and 
by contorted Caradoc Sandstone for the remainder of the length. 
11. Helmeth Mill. 
This low narrow ridge continues the line of Caer Caradoc for a 
