Vol. 58. ] THE RED SANDSTONE-ROCKS OF PEEL. 641 
Tasie or MarerRiats FORMING THE Lower BrockrRAMs OF THE PEEL SERIES, 
AND THE Upper BrockKRAMS OF THE STACK SERIES. 
Lower Upper 
Brockrams. Brockrams. 
¢ yey ora erry 
ten 
; o iS ce! >. 
=) | 29 $ S| | 
a ae fara os) =| 
Co mh 3 Fy o oO 
Ss & ~ a qa 
a! = = @ 1S) Oo an’ = 
Gis Io} oS) CsKe) 
== to iS ©) ‘5 =e 
ao = Hg 3 
as 5 SU ier es 
Carboniferous Limestone, grey crinoidal ... % x * & 
Do. do. red crinoidal % * * * 
Do. do. pink crinoidal ...| ... x x * 
Do. do. decalcifiederinoidal| <x 
Carboniferous chert, prey  ..........sceceeceees * * * * 
Do. dotctblacks. scree. fe ores % * 4 * 
Do. COMET CCG 05.2 Sees cea Oa * hae om " # 
Moremdale shale; Grev.....682.- 60.2. e000. eres fee * % Ae % 
Do. COs i SUL Le ne ae ee Eee x * * * % 
Porm MaristOne, Purple. .c.....06. 05645 .008 * % * eee: 
Wart paswuaGstone, purple 62) ...0cls.-. ees, x * * * | #* 
Do. ot RARSTC Va yacas doit ccars. 5 hen x % Se Ser ey la gee 
. | 
JD et AEST Ur 2 ee i * % * 3 ln 9 
Dire tela CedOny <c5: oacsecdsee. cs aneveee ss * x % % 
Micaceous grey sandstone ................000.. % * * 
Keisley Limestone, pink mottled ............ a hie Be * 
PP PMMAELZILE 5 5255). oh oes aiue dis ce nseewese ees os Eat “ * 
VET) TE 9 Ae * % * * 
All these materials have been derived from rocks which form the 
Lower Carboniferous and the Ordovician Series in the Lake District, 
with the exception of the two last, which may belong to any older 
pebble-beach. The hematites (sometimes botryoidal) and the chal- 
cedonies are especially characteristic, and are, so far as | know, only 
found together in the Lake District. ‘The Keisley Limestone also 
is a Lake-District rock, occurring in the neighbourhood of Appleby. 
It is, however, unnecessary to go to the Lake District for the 
source of most of these materials. The borings described in the next 
following paper (p. 647) reveal that Carboniferous Limestone and 
Yoredale rocks occur underneath the Glacial Drift covering the north 
of the Isle of Man; and a comparison of the cores with the pebbles 
under discussion proves, beyond doubt, that the latter were derived 
from Lower Carboniferous rocks, then forming cliffs in the north of 
the island. ll the varieties of the pebbles of Carboniferous Lime- 
stone and Yoredale shales and sandstones are represented in the 
borings, with the exception of the decalcified crinoidal limestone. 
The decalcification of the last-named is doubtless due to its exposure, 
at the surface, to the attack of the carbonic acid contained in the 
rain-water. 
If there be any doubt as to the post-Carboniferous age of these 
Q.J.G.8. No. 232. 2¥ 
