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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 1 9 10, 



covered with characteristic glacial striae. I had the pleasure of 

 showing this block to Sir John Evans, who at once recognized it as 

 a glacial boulder. 



Fig. 2. — Gravel (g) folded into lacustrine beds, consisting of thinly 

 bedded clay (c) and sandy clay (sc) overlying sand and 

 gravel (sg), Wolvercote, Oxford. 



SC. 



[The folds in the drawing are more formal and better denned 

 than they are in fact.] 



Similar gravels, contorted and containing striated boulders, occur 

 at Coombe, about 7 miles north-north-east of Oxford (137 feet above 

 the Evenlode), and at Picket Heath's Farm on Cumnor Hill (356 feet 

 above the Thames), where the gravel assumes the character of a true 

 boulder-clay, and affords abundant glaciated boulders of igneous 

 rocks which must have been transported from some remote locality 

 not yet identified. 





