344 
Davies—A Walk over the 
Ceiriog, distant some eight or nine miles from Oswestry. ‘After an 
early breakfast, we strapped on the munitions of war and looked 
: SS 
LS 
ped). 
| Coal-measures. 
Millstone-grit. 
Carboniferous 
Limestone. 
Wenlock Shale. 
Foss. Sandstones 
and Shales (May- 
hill Sandstone ?) 
9. Top band of Limestone (Hirnant 
8. Pale Shales, fossiliferous. 
10. Pale Shales. 
Bala Lime- 
stones, Shales, 
Trappean Ash, 
and Green 
Sandstone. 
7. Middle and main band of Bala Lime- 
5. Lowest band of Bala Limestone. 
ZY ow |. 
ZY oh 
Zz AP 
REA 
SM <H 
t isp) 
iN 
rt 
Li foes Zone of dark _, 3 
i Gi earthy Slates, O06” 
Coun eylye. Kiyanieas| | through numer- 23 
en SHV y i ousfoldsand @&a< 
iar eeae ae KNIT dislocations ~< caer: 
Ran er Ay AWWA | forming the sur- 2 Za 
Llanarmon NN face of apreat’ [Sue 
x KWAN | portion of S. W. S455 * 
INS Denbighshire. sles 
ASS 44 
SWOw Bs 
I SH 
EX tnd 
Bala Limestones, < 2 
Shales, Trappean Rona) 
Soe N { Ash, and Green- aco 
# 3 Ss stone. 3 8 
HOM S -@ 2m 
now 2 eace 
oun- 8 3 | gaa 
tains. 699 q Zoe 
eee ie Petes 
ArH Z| \ Bala Limestones, Ose 5 
Shales, Trappean 4 ("5 5 
Ash, and Green- 14 $2, 
Lake and ---~~ stone. Be S34 
Town of Zone of dark MAH 
Bala. earthy Slates and a c3 
Shales. 
4A —Ffestiniog Slates ) & . 
and Porphyries. { = %& 
ds 
} Tremadoc beds. sa 
4 
Z 
Section illustrative of the general order through North Wales of the beds described in this paper 
based upon the sections of the Geological Survey, some details supplied by the Author. 
Cambrian. 
well tothe ‘ commissariat,’ 
and, determined to make 
the most of the short day- 
light, we turned our backs 
upon the good old town of 
Oswestry. 
Our route lay westward, 
up the slopes of the Coal- 
measures (here not work- 
ed) and of the Millstone- 
grit, to the racecourse of 
the town. From this point 
an extensive prospect is 
% gained, embracing the plain 
of Shropshire, bounded on 
the east by the igneous hill 
of the Wrekin—on the 
south by the Brudden, of 
like plutonic origin, and the 
mining district of Shelve, 
backed by the Stiper Stones 
and the Corndon. Now 
we bent sharply round to 
the north, and passing the 
old earthwork of Offa’s 
Dyke, here a considerable 
rampart, we crossed the 
Welsh border-band of Car- 
boniferous Limestone, 
which is at this point ex- 
tremely narrow, and then 
came at once upon a band 
of Feldspathic Ash, which 
runs up against the Lime- 
stone like a buttress. We 
followed the course of this 
Ash-bed for a mile or two, 
and then, near the lonely 
mountain-farm of Llech- 
ryddau, we made a halt to 
examine its structure and 
position. 
Fortunately for us, 
though contrariwise for 
the miners who expected 
to find copper here, a level 
has been driven through 
the Ash-bed, along the 
