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TRANSACTIONS OF SECTION C. 
2. Note on the Surface of the Mount Sorrel Granite. 
By W. W. Warts, ILA., F.G.S, 
It has long been known that, when first exposed in the quarries, the granite of 
Mount Sorrel exhibits a smoothed, grooved, and slightly terraced aspect. As the 
surface, when first discovered, was covered with boulder-clay, it has been concluded 
that it was produced by glaciation. The writer has long had doubts with regard 
to this interpretation, and recent excavations near Mount Sorrel have thrown anew 
light on the phenomenon. At Hawkley Wood and Nunckley Hill similar but 
smaller surfaces have recently been exposed which are covered by undisturbed Keuper 
Marl, while another surface, exposed at Nunckley Hill, has boulder-clay abutting 
on it. Thus the grooving, terracing, and smoothing, like so much of the scenery in 
Charnwood Forest, was originated in Triassic times, though locally it may have 
been somewhat modified by glaciation. One loose block of granite, apparently 
removed in baring the surface of the rock, presents characteristic fluting and 
glazing like that due to the action of wind. The writer wishes to thank Mr, R, F, 
Martin for calling his attention to these newly exposed surfaces. 
3. On the Origin of Chondritic Meteorites.—By Professor A. RENARD. 
4. On Coast Erosion. By Captain McDaxin. 
The district dealt with is the coast from Deal to Dover, Folkestone and 
Sandgate. 
The Six-Inch Ordnance Survey, 1877, is taken as the standard. Several 
noted falls are mentioned. 
The comparatively slow action of the unaided sea, ascertained by boring holes 
in the cliffs, has been recorded. 
The more rapid effect, where the waves are charged with a small quantity of 
shingle, and the absolute barrier thrown up by the sea when it forms large banks 
of shingle. 
The important part played by the springs is dwelt upon as one of the chief 
causes constantly at work. 
The disintegratory power of the frosts and the accumulation of water on the 
hollow surfaces of the usual pervious chalk, due to the freezing of the otherwise 
porous surface. 
The moisture-absorbing power of the chalk, which amounts in many instances, 
especially in that of the Upper Chalk, to over 20 per cent. 
The compression of air in the joints and fissures of the rocks by an incurving, 
on-rushing wave, are all factors influencing the coast erosion. 
The writer is of opinion that although the falls of the cliffamount to thousands 
of tons, the area lost has not been great in historic times, for the Roman light- 
house at Dover Castle, and the foundations of a similar structure on the western 
heights, show that their position with regard to the coast is very much the same 
now that it was nearly two thousand years ago. 
The more rapid destruction of the Dover cliffs within the last fifty years is 
curiously due to those structures that might be supposed to protect the cvast, the 
breakwaters at Dover and Folkestone, which intercept the shingle that would 
otherwise form a natural protection to the coast. 
5: On Coast Erosion. By G. Dower, F.G.S. 
The author has, during the past several years, recorded the coast erosion in 
Kent with Captain McDakin, of Dover, and in this paper continues these observa- 
tions from Walmer, on the south of Kent, to Whitstable on the north. The fol- 
lowing particulars are given:—The progress of the northward drifting of the 
