462 Notices of Memoirs—A. R. Horwood—Middle Lias. 
marl may be seen at a height of 810 feet, and the marl may be traced 
in the fissures of the Cambrian rocks to a height of 880 feet. Hence 
the conclusion that the Keuper marls at Bardon reach an elevation at 
least as high and possibly higher than at any other point in the 
same strata in England. 
2. Submergence.—The probability of Bardon Hill (912 feet), and 
therefore the whole Charnwood area, being entirely submerged during 
Triassic times presents itself as a problem. 
The authors find at 810 feet two distinct ‘skerry’ bands resting 
upon, and overlain by, Keuper marl. In the Siberia Quarry the 
marl is found filling in two joints which rise nearly vertically a 
height of 80 feet. This ‘filimg’ may be traced in the joints to 
a level of 880 feet, or 82 feet below the summit of the hill. There 
is no evidence suggesting the sudden termination of the marl at this 
level, but further tracing was prevented by vegetation. It is obvious 
that the marl must have been deposited from an elevation higher 
than 880 feet. 
Further evidence in support of submergence is offered as follows :— 
The general dip of the marls in this district is from 1° to 3° 8.E. 
Allowing an inclination of 1° only, or 90 feet per mile from a point 
at the junction with the Rhetics near Leicester, this would give (on 
the assumption that this inclination originally extended to Bardon) 
a covering of over 200 feet of marl above the present hill. 
V.—On A HITHERTO UNNOTICED SECTION OF THE AWALTHEUS SPINATUS 
ZONE AND THE TRANSITION Brep in THE MippzieE Lias at BrtEespon 
Coptow, LercrstersHirE. By A. R. Horwoop.! 
f|\HE author, after alluding to a section published by E. Wilson in 
the Gronocican Magazine, 1889, p. 296, of the Marlstone in the 
railway cutting at Tilton, Leicestershire, referred to a statement by 
that writer regarding it as the only exposure of the Amaltheus 
spinatus zone and Transition bed in the county. 
Some recent researches, however, have resulted in the discovery of 
these beds in a little quarry on the road between Tilton village (some 
distance from the cutting quoted) and Billesdon Coplow, forming part 
of the escarpment called Life Hill, and about 700 feet O.D. 
There the very characteristic Gasteropod and Cephalopod zone of 
the Transition bed is well developed; and so uniform is this horizon 
in position and faunal contents that the author wished to see more 
stress laid on it than had previously been done, as indicating the 
uppermost beds of the Marlstone wherever found, being indeed a safe 
guide where other beds were wanting to denote this. 
Another feature to be noted in the higher part of the Rock-bed, 
hitherto unnoticed or but little emphasised by previous writers on 
Liassic geology, was the occurrence of a very well-marked encrinital 
limestone band, varying from a foot to eighteen inches, though often 
less, of a very hard nature, less subject to the effects of weathering 
and decomposition than the Marlstone itself, which occurs some three 
or four feet lower in the section. This is to be found also on Tilton 
1 Read before Section C (Geology), British Association, Leicester, 1907. 
