364 THE DEPOSITS. 



rated stones and rolled boulders, which had dropped from 

 later formation, clear. Allowing for this, I think his remarks 

 pertinent and copy them : — " In the Vardes quarry pockets 

 filled with old beach are found underlying large decomposed 

 boulders, some of which boulders seem to have been rolled, 

 while others had only slipped a short distance along the 

 jointing planes. In the Pulias beach quarry, the old beach is 

 seen to pass under the " Head " three or four feet thick. The 

 great rock at the projecting point East of Peqneries Bay is 

 one of the most extraordinary specimens of riven rocks in the 

 island. The immense blocks have separated along the jointing 

 planes and slipped outwards in every direction. The largest 

 block measures 35 x 13 x 16 feet, and is estimated to weigh 

 300 tons. It has not only slipped, but has turned over (my 

 italics), and is lying on old beach and " Head" which rests on 

 a sea-washed face of rock." 



In Jethou the detached rocks, separated in the same way, 

 are enormous in size, even exceeding the quoted example. 

 This same fact was long ago noticed in England. I give one 

 statement as an example. " We everywhere may observe a 

 passage downwards into beds which mark a time when the 

 degradation of the surface proceeded much more rapidly than 

 by the mere effects of decomposition, and when fragments of 

 rock, and even blocks of large dimensions in certain localities, 

 far exceeding the moving power of any rainfall (the italics are 

 mine), were conveyed down the very slopes along which only 

 the very minutest particles are now carried." 



These quotations will serve to illustrate the facts I speak 

 of, and I pass on to endeavour to give my idea of the condition 

 of the island as a result of the emergence and uplift. 



As this will be followed by other stages which will recall 

 the conditions here described, it will suffice for me to say that 

 the surface of the island was denuded of loose material, and 

 that the rocks were frost-riven and all surfaces covered with 

 angular blocks ready to be moved by the agencies at work in 

 the next stage, the glacial. 



Stage 3.— Part 1. 



THE DEPOSITS USUALLY CLASSIFIED UNDER THE 



TERM "HEAD." 



THE FORMATION OF THE " HEAD." 



These are deposits covering the cliffs, which, everywhere 

 on the borders or coast lines (except such places where sea 

 erosion has removed them) of the Channel. There are 

 successive layers of angular stones, interspersed with clay 



