96 Correspondence—Mr. W. D. Carr. 
from which point eastwards the whole Keuper Division is exposed, 
with quite a normal facies, as seen in the Midlands, in Central 
Germany (Thiiringen, Jena), and in the Neckar Valley. 
In the marls which underlie the Budleigh-Salterton Pebble-bed, 
he recognized the equivalents of the Permian Marls of Warwick- 
shire and Nottinghamshire, and of the Zechstein Marls of. Germany. 
These pass, by a gradual transition, through Sandstones, becoming 
more and more brecciated, into the great brecciated series of Dawlish 
and Teignmouth, which were regarded as the equivalents of the 
great Permian breccias of the west of England, of Ireland, and of 
the Lower Rothliegendes of Germany. 
All the rocks below the Budleigh-Salterton Pebble-bed were 
regarded as the assorted materials furnished by the detritus of the 
Paleozoic mountain-region of Devon, Cornwall, and Brittany, and as 
representing the waste and degradation of that region, deposited on 
the mountain-flanks and in land-locked bays during Post-Carboni- 
ferous times, the marls being compared with the Nyirok of the 
Austrian geologists. 
CORRS @aAN eae asiS aaa 
ERRATIC BOULDERS. 
Srr,—Your notice of Prof. Hull’s paper on “ Boulder Stones,” 
read before the British Association last year, recalls my attention to 
an interesting example of a boulder I came across during a geological 
excursion in the Grantham district (Sheet 75) some four or five years 
ago, which I believe exceeds the dimensions of the largest given by 
Prof. Hull. I had stayed the night at the village of Marston, 
about five or six miles west of Ancaster, and was making my way in 
the early morning towards the quarries of our noted Lincolnshire 
freestone, situate at the latter village, when I noticed a rough accom- 
modation road metalled with Lincolnshire Oolite. This struck me 
as rather strange, there being several quarries in the Marlstone much 
nearer at hand. I followed it up, and ultimately found the quarry 
from which the stone was obtained, a quarry in Lilncolnshire Oolite! 
at least five miles further west than one would expect to find such a 
thing. The quarry, on examination, proved to be excavated in a 
huge boulder stranded on a hill of Middle Lias clay capped by Marl- 
stone. The boulder was almost covered by a very tough chocolate- 
coloured Boulder-clay, containing Lias fossils, and grassed over. A 
roadway was cut into it for a distance of twelve or fifteen yards 
(writing from memory). ‘The definite outline of boulder was 
obscured in all directions except the entrance to the quarry, where 
the workmen had cut down to the Lias below, the lines of bedding 
dipped about 20 per cent. N.W. This stone had probably travelled 
from the neighbourhood of Ancaster, five miles east, where the line 
of cliff (escarpment of the Oolites) is cut back and forms a sort of 
gorge; this is the nearest point it could possibly have come from. 
W. D. Carr. 
