13 
THE YORKSHIRE BOULDER COMMITTEE AND ITS 
TWELFTH YEAR’S WORK, 1897-8. 
PERCY F. KENDALL, F.G.S., Chairman, 
AND 
J. H. HOWARTH, F.G.S., Hon. Secretary. 
UNREMITTING attention has been devoted to the subject of 
boulders during the year, resulting in returns which are 
described in the report of the Boulder Committee of the British 
Association as ‘a valuable and significant set of records.’ 
The discovery of two large glaciated boulders of chalk near 
Scarborough is of interest, as that point is fully 20 miles to the 
northward of the chalk cliffs of the Yorkshire coast. 
Attention was directed last year to the remarkable fact that 
the Belemnitelle collected from the drift of Holderness belonged 
without exception to the species B. lanceolata, unknown as 
a constituent of the fauna of the Yorkshire chalk, which 
contains instead B. guadrata. This conclusion is fully sustained 
by the work of the past year, and emphasises the well-known 
fact that b/ack flints, which are unknown ‘in the local chalk, are 
found plentifully in the glacial deposits of the Yorkshire coast. 
One such flint, containing a cast of Zchznocorys, is reported 
from the inland station Market Weighton. 
Further valuable work has been done upon the distribution 
of Shap granite, and its sporadic grouping receives a fres 
illustration from the Yorkshire coast. 
Further light is thrown upon the source of the in many 
ways anomalous patch of boulder clay at Balby by the discovery 
in it of three specimens of Eskdale granite. 
Our knowledge of the distribution of erratics of Scandinavian 
origin receives a welcome addition by the observation of a 
second example of the granite from either Angermanland or 
Aland (Sweden) at Easington, and by the recognition of a pebble 
of rhomb-porphyry at Brough. The latter is the first undoubted 
occurrence of a Scandinavian boulder within the line of the 
Chalk Wolds. 
The Committee is also enabled to announce the recognition 
amongst the far-carried erratics of the east coast of England of 
a considerable number of Norwegian rocks from localities which 
were not previously known to have yielded boulders to the 
English drift. 
January 1899. 
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