An yEolian Deposit at Clevedon. 373 



cast when taken out. It was, indeed, the only alien block found 

 in the deposits anywhere, and is the solitary exception to the 

 Holly Lane oolite blocks mentioned above, from which it also differs 

 in being sub-angular. On that side of the valley (Fig. 2), 

 at the 55-60 ft. level, it could not possibly have been carried from 

 Conygar by the agent which brought about the accumulation of 

 the breccia. We may also reject the possibility of its having fallen 

 from some patch of Trias conglomerate concealed among the w'oods, 

 for no Triassic blocks have been found, and the Triassic outlier at 

 Walton Castle has yielded no fragments of Coal Measure sandstone. 

 It is, m short, almost impossible to imagine how it could have been 

 brought by any '' natural " agencies. Further, its corners show 

 some signs of battering, as if used as a hammer, for which its size 

 and shape would be well adapted. Provisionally, therefore, human 

 agency may be suggested as the most likely explanation of its 

 presence. 



Local Detail. 



This may be difficult to realize from perusal alone. But, as several 

 of the exposures have disappeared altogether, as all of them are 

 liable to rapid change, and as such change now tends not to improve- 

 ment but to deterioration, the evidence ought to be placed on record. 

 The descriptions will also be a guide to those who may visit the 

 ground. 



Holhj Lane (Figs. 1, 2, 3). — As this is by far the best section, 

 its leading features have already been described by implication. 

 Its western cliff is the only place where more than two members 

 are to be seen together. There are five bands. The lowest is a 

 sandy breccia with blocks about three inches in diameter. This 

 passes rapidly up into a very coarse breccia with blocks as much 

 as 5 feet long. Then follows, rather abruptly, a sandy loam (the 

 best to be seen anywhere) with capillary tubes and a few small 

 stones. It graduates upward (though so rapidly that the junction 

 is quite distinct in good states of weathering) into loamy sand with 

 about one stone to a square foot of section. The latter is full of little 

 flakes of thin land-shells (which stand at all angles), and well-pre- 

 served specimens, especially of Helix hispida and Pupilla muscorum, 

 have been obtainable at any time during the last three years (1916- 

 20). They are not equally distributed. Most of them occur along 

 a sort of horizon rather below the middle of the band, and in that, 

 too, are ajjt to occur in little groups or crowds. Both bands 

 display the vertical cleavage well, especially after frost. Upon 

 the sand rests an upper sandy breccia, with blocks usually about 

 3 inches, but occasionally 2 feet, in diameter. All the bands thin 

 uphill. The most striking feature of the section is the remarkable 

 deposition-dip, which rises to as much as 32 degrees. Since 1905 

 the whole mass of deposits has been slowly cut back westwards, and 

 Mr. Male states that the section was not so good in 1916-17 as when 



