THE ICE=BORNE BOULDERS OF YORKSHIRE. 



J. H. HOWARTH, J. P., F.G.S. 



{Continued fro7n page 146). 



GENERAL DISTRIBUTION OF YORKSHIRE ERRATICS. 



As stated in the introductory observations, the boulders 

 selected here for tabulation because their character and ap- 

 proximate source are identifiable, are everywhere accompanied 

 by others, often in far greater numbers, which have joined the 

 former on their travels as picked up by the moving ice. 



These are b}" no means to be ignored in studying the glacial 

 problems of the county, since the}- throw much light, of course, 

 upon the ice movements when considered in greater detail. 



The following tables are reproduced from Rei^-orts of the 

 Committee, and will be found interesting and instructive. 

 The\- are the results of excellent work done by members of the 

 East Riding Boulder Committee : — 



BOULDERS NOTED OX THE HOLDERXESS COAST 

 BETWEEX WITHERXSEA AXD HORXSEA, 1S95. 



Table I. 



BOULDERS 

 Over One Foot ix 

 Diameter. 



S-3 - - 



1 3 



o — = 



■f-e 2^-- --^^'O^- <t;^ o=x - oX 



£=1 r i^^^l 

 i5 5:<3 2: =-3 il^ |s ^2:1 



s be 



Origin. 



a Miles 



1 Mih! 



l.i Miles 



1 



i 



SO 



j 

 i 



1 Mile 1 



2 Miles 



1 







3 

 U 



Carboniferous Limestone ... 



38 1 



1 



103 



24 



25 



57 



197 - 



i 



36 



54 



534 



25-8 



Sandstone, Grits, etc. \ 

 chiefly Carboniferous / 



12 



49 



19 



13 



17 



85 



33 



47 



275 



13-3 



^ 1 I'Lias Shale ... 



|i ' \ Chalk 



J B Other Limestones i 

 S V and Sandstones. / 



4 

 3 

 2 



88 

 8 

 0 



37 

 8 

 21 



19 



5 



58 



121 

 80 

 26 



34 

 46 

 12 



84 

 28 

 19 



345 

 187 

 104 



1 30-8 



) 



■ 



Basalts and other eruptive i 

 rocks. / 



16 



64 



31 



■25 



74 



28.5 



23 



86 



c54 



26-7 



Granite, Schist, Gneiss, etc. 



7 



7 



i 4- 



j 



5 



j 9 



30 



2 



i ' 



i 



i ''1 



1 



3-4 



1 



Totals 



82 



274 



144 



i 



95 



1 



240 



824 



186 



: 225 



2070 



100-0 



