91 
LAND-SHELLS IN THE INFRA-GLACL\L CHALK-RUBBLE AT SEWERBY, 
NEAR BRIDLINGTON QUAY. 
BY G. W. LAMPLUGH, F.G.S. 
In the coast-sections around Flamborough Head the Glacial 
deposits are frequently underlain by an earthy chalk -rubble 
of variable thickness, to which the term " chalk - wash " was 
applied by Mr. J. R. Dakyns.* This chalk-rubble usually 
rests directly upon the chalk, but at the crest of the buried rock- 
cliff beneath the drifts at Sewerby near Bridlington Quay, the 
rubble passes off the chalk and covers the fossiliferous " Infra- 
Glacial " beds which have been preserved under the lee of this 
old cliff, as shown in the accompanying section (Fig., p. 94). f 
By previous researches it has been proved that the chalk-rubble 
to the westward of the old cliff not only descends rapidly to sea- 
level but sinks still lower as we approach Bridlington Quay, so 
that, near Sands Cut, its top, as proved by borings through the 
Basement boulder-clay, lies 22 feet below the level of the shore. { 
Though it has long been recognised that this chalk-rubble 
probably represents the sub-aerial waste of an old land surface, § 
tlie material had not hitherto yielded any fossils except a single 
limb-bone of Bos or Bison.\\ While living in the neighbourhood 
I searched it repeatedly without success ; but during a recent 
visit to Bridlington, in examining a good exposure of the bed 
on the foreshore between 200 and 300 yards S.W. of the Sewerby 
buried cliff, I noticed some thin seams of brown loamy earth 
intercalated with the fine chalk-rubble, and found that small 
* Proc. Yorks. Geol. and Polytec. Soc, vol. vii., pp. 249-252. 
t ■■ Report on the Buried Cliff at Sewerby," Proc. Yorks. Geol. and 
Polytec. Soc, vol. ix. (1887), pp. 382-392 ; and Rep. Brit. Assoc. for 1888. 
i Proc. Yorks. Geol. and Polytec. Soc, vol. xi. (1889), p. 284. 
§ J. R. Dakyns, op. cit., and G. W. Lamplugh, Quart. Journ. Geol. 
Soc, vol. xlvii., p. 414. 
;i See ■' Drifts of Flamborough Head," Quart. Journ. Geol. Soc, 
vol. xlvii., p. 394. 
