296 LANDSLIPS IN BOULDER-CLAY NEAR SCARBOROUGH. [Aug. IQOI, 



sand, and here and there a little gravel. There had heen a long 

 spell of dry weather, and the clay was hard and dry. Some rain 

 fell on the Sunday, but whether it was in any way the cause of the 

 slip I do not know. The slipped material appeared to be wholly 

 Drift ; the central part had travelled farthest, leaving a long deep 

 depression behind it, and into this the sides had to some extent 

 fallen. 



On the solid clay at the sides of the slip were well-marked 

 longitudinal striae ; in places I noticed a cross-striation on a small 

 scale, and on a very few of the fallen blocks of clay striation could 

 be seen. There was a certain amount of sand in the slipped 

 material, but it consisted mainly of blocks of clay of all sizes and 

 shapes : the largest blocks being at the back of the mass. The slipped 

 mass projected on to the foreshore well below high-water mark, 

 the front of the slip on the foreshore being about 200 yards from 

 the ridge whence it started. 



Discussion. 



Mr. HuDLESTON said that he had no intention of offering any 

 critical remarks on the Author's paper. The excellent illustrations 

 shown on the screen called to mind many a well-known spot on the 

 Scarborough coast, where the Jurassic rocks are in places so much 

 obscured by Boulder-Clay. Without giving any opinion as to the 

 cracks mentioned by the Author, he could not help noting a 

 resemblance to glacier-ice in the behaviour of much of this Boulder- 

 Clay, where crevasses and pinnacles of stony drift, weathering into 

 fantastic shapes, remind one of similar features in Alpine regions. 



The President also spoke, and the Author replied. 



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