236. 
Section through the base of Clogher Head. 
1S.S.W 
lad 
aad 
N.N.E 
eclogher 
B.9 B.10 BI! B12. B.13-- 
GARDINER AND PROF. REYNOLDS ON 
B14 81! 
12 inches=1 mile vertical scale exaggerated. | 
[Horizontal scale : 
[ May rgo2, 
Tamla” aiibil i 0! «1 Dhieknessamifeets 
B (1) Green sandy grit, ashy 
Sh Sis towards the original - 
base; original top 
Nob Seen a oacseeee ee ? 
B(2) Green ash, with large’ 
dark fragments...... 6 
B(3) Red sanastone, with Me 
fine ash-bands...... 390 
~B(4) Intrusive greenstone . 46 
B(5). Fairly coarse ash... 70 
B(6) Rhyolite of Clogher 
Head 5 ons tes Soe 175 
B(7) Ash, with — rhyolitic 
bands “US. cee eee 320 
B(8)  Calcareous flags ...... 230 
B(9) Green ash, with large... ; 
dark fragments... 40 
B(10) Calcareous flags. ...... 60 
B (11). Coarse. ash- ~ Goeee 25 
B (12) Calcareous flags ...... 10 
B (18) Rhyolite, with some | 
ash-bandls: (eens 250 
B (14) Ash: hic ee ee 15 
Se = perhaps 
B(15) Caleareous flags 1 56 feet seen. 
Excluding the intrusives, this gives 
a thickness of at least 1556 feet. 
B(1). In Coosmore these new- 
est, but (as they now lie) lowest 
beds are seen to be gritty slates 
containing Orthis — eleyantula, 
Dalm., Atrypa reticularis (Linn.), 
and abundant worm-tracks—the 
‘fucoids’ of the Geological Survey 
Memoir. These worm-tracks are 
very abundant in the Upper Wen- 
locks of the district. ‘Lhe beds 
are highly disturbed, traversed by 
several faults, and overfolded in 
the neighbourhood of the thrust. 
Fig. 6 (p. 237) shows a section 
along the eastern side of Coos- 
more; while the further succession 
is seen in the gully which leads 
down into the head of Coosmore, 
and also farther along the northern 
coast of the Clogher-Head pro- 
montory. There the beds, which 
are seen to be thrust over the 
coarse conglomerate, are red and 
green grits, much contorted in the 
