Vol. 58. ] ‘THE RED SANDSTONE-ROCKS OF PEEL. 637 
calculated along the line of section, from the north of Ballaquane 
Quarries to the Coastguard Station, 1s 325 feet. They in their turn 
plunge underneath bright red, mottled sandstones (No. 21 of fig. 1, 
p. 634) with thin marls, at the base of the cliff below the Coastguard 
Station. These are some 80 feet in thickness, ranging upward as 
far as the lowest bed of the Stack Series in Lhooby Reeast. 
lV. Tor Upppr SanpstonEs, BrockRaMs, AND LIMESTONES 
OF THE STack SERIES. 
The calcareous conglomerate-series at the eastern end of Traie 
Fogog presents the following section :-— 
Thickness in feet. 
7. Bright red sandstone and calcareous conglomerates, 
with concretions of dolomite embedded in red paste . 20 
6. Irregular layer of dolomitized limestone and calcareous 
concretions, with conglomerate and red sandstone ... 8 
Ba wed sandy marl, mottledierey. 3/.0.2fec.d cael coop etate 12 
4. Conglomerate, mainiy of limestone-pebbles, in a red 
Sai Ghy MASIWESTAM: MIALEUNS «freee cl cut ae sche Ses sane as 5 
ty LLU O UES TCDISTECY 0 (© | er ey Het meen a a era A 43 
2. Bright red, mottled marls, with grey calcareous con- 
CECHIOMS ease siete cee Maca ded oa tnntite demeicneoneen 103 
1. Conglomerate, consisting mainly of limestone-pebbles, 
Wi a red Saldy MapmMesiam WAtTIX 1.2)... 22 ..0e 2s .c soa 10 
70 
The upper stratum, No. 7, passes into a series of ten thin beds of 
concretionary magnesian limestone, so irregularly distributed in the 
sandy Brockrams as to render an accurate description impossible. 
With them thin lenticular sandstones and red marls are so inter- 
laced, that no two sections taken along the line of cliffs from 
Traie Fogog eastward to Lhooby Reeast agree. They are ripple- 
marked and sun-cracked, and were therefore accumulated in part 
between high- and low-water mark. The uppermost beds consist 
of Brockrams (conglomerates and breccias), plunging into the sea. 
atthe Stack, at an angle of 35°. 
The total thickness, measured along the line of dip, is 426 feet, 
and the average dip is 40°, slightly to the west of north; the actual 
upper boundary is beneath low-water. 
V. Tar CLAssiFICATION OF THE Rocks. 
These rocks form oue series, which may be conveniently subdivided 
as follows :— 
Thickness in feet. 
BI. The Wpperior Stack Series, oo. 25.00. ccaecedencetere 426 
I. The Lower or Peel Sandstone Series..........., 1278 
Dp: Bright redisandsione, ses.) h.0 162s avee vee: about 80 
C. Dull red sandstones of the Gob and Traie Fogog 325 
B. Ballaquane and Creg-Malin Beds .................. 385 
A; Drut-covered sandstones. 22 32sz4eessasp-e oe -e- 488 
The3 true base of these rocks is concealed by Drift, and is 
nowhere visible. 
