364 TATE: THE YORKSHIRE BOULDER COMMITTEE. 
the bottom not reached. Its thickness at Savile Town and Heath- 
field varied from 15 to 20 feet without finding a base. At all these 
stations, towards the bottom of the gravel bed, a fair proportion of 
the Buttermere granophyres ranged up to 18 or 20 inches in length. 
About Elland the gravels do not exceed g or 1o feet in thickness, 
while local sinkings west of Wakefield Heath, about Thornes, have 
shown the gravel-bed to have a thickness of from 34 to 40 feet. 
Excluding local rocks, the Buttermere granophyres are by far the 
most important; next come the Eskdale granites, after these rank 
the Borrowdale andesitic ashes and lavas, the devitrified phyolites 
pees rae with the Coniston ner oS ae es in es 
the present, we may say, ampl 
Scottish rock, nor of Carrock Fell, Byeae Hill, Boris rhea 
Armboth, or Shap rock has been identified in the Calder Valley. 
An efficient exploration of Holderness, with especial reference to 
_ the distribution of Scandinavian erratics, was initiated last February 
under a strong local sub-committee, with Mr. J. W. Stather, F.G.S., 
d 
rie 
out, and it is not intended that any report should be presented until ae 
at least some well-defined area is complete d. i 
The work of the Map sub-committee is not so advanced as was — 
eatiespabed: By the removal of their mapper, Mr. Chas. Brownridge, 
-A.M.Inst.C.E., F.G.S., to Birkenhead, delay became inevitable. 
Fortunately the benefit of his experience is retained, as he continues 
his connection with this committee. However, a section of our 
new Yorkshire Glacial Map, embracing one horizontal strip from 
Todmorden to Spurn Point, was submitted to the glacialists attend- 
ing the Nottingham meeting, showing how we — to i = 
a the mapping of the Yorkshire erratics. 
eS ing their attention to the area aroun 
ae Barnsley, upon which they hope to report next year, and se wi 
—— any local help that is available. — aoe 
ce During the past year the following « erratics Hive esis record 
. ss alee! by the Rev. Wa. R. Bett, Laithhirk Vicarage, Midileton-in Teesdale 
All in the Parish of Laithkirk. 
‘Suar Grantre BOULOEES ~ 
