156 C. A. SUSSMILCH. 



seaward end and formed part of the bed of sandstone upon 

 which it now rests. Its original position is shown by the 

 X in Plate V. Its rectangular shape is due to the exist- 

 ence of two set of joints, approximately at right angles to 

 each other, in the sandstone bed to which it previously 

 belonged. Wave erosion, while it was still in situ, had 

 widened these joints, and thus separated it form the bed as 

 a whole; the presence of marine growth over much of its 

 then under surface shows that it was not rigidly joined to 

 the underlying stratum immediately prior to its removal. 



To reach its present position it must have been elevated 

 through a vertical distance of at least 10 feet, and then 

 carried aloug a horizontal distance of about 160 feet. While 

 in transit it must have been turned completely over, for it 

 is, as shown by the marine growth, now resting upon what 

 had been its top before removal. 



Mr. E. 0. Andrews, b.a., has made the following calcu- 

 lation as to the power necessary to lift this block of sand- 

 stone through a vertical distance of 10 feet in one second. 

 As it was lifted over a nearly vertical face, it may be 

 assumed that it was lifted in one act, and that the time 

 taken was not more than one second. 



Assuming that the specific gravity of the sandstone is 2*5 

 its weight in water would be only § of its weight in air, 



.". weight in water = 235 tons X f = 135 tons ; 

 the vertical height lifted being 10 feet, 

 then 135 x 10 = 1350 foot tons necessary to lift the block, 



,. HP = 1350X2240 = 5m 

 550 

 One end of this sandstone block was broken off during 

 transport and carried several hundreds of feet farther to 

 the west. 



Many other illustrations of the power of the waves during 

 this particular storm may be seen in the same locality. In 



