HEADON r.EDS. 139 



1 foot 8 inches thick at Cliff End.* This correlation is probably 

 correct, but it has been found impossible to connect the beds by- 

 mapping. 



Inland sectitms of the Headon Beds are rare — at least sections 

 which yield any evidence of definite horizons seldom occur. A 

 very fossiliferous section is exposed in a miniature chine, cut 

 between the north-east corner of Freshwater (All Saints) Church- 

 yard and the marsh. A good deal of gravel has slipped over the 

 beds, which are only clear at the bottom of the channel, so that 

 it was impossible to obtain any measurements. The principal 

 fossiliferous bed consists of a mass of shells in a slightly hardened 

 sandy matrix. The species collected in 1887 were Planorbis 

 ohtusus, NeritiiKt concava, Nematura parvula. Melanin muricata, 

 Melanopsis subjusiformis, Limnceu longiscata"^ Hydrohia Chasteli, 

 Cerithium elegans, Cyrena obovata, Cyrena deperdita, Serpuliiy 

 Chara. The specimens of Nerithia are particularly fine, being 

 unusually large, and with the colour well preserved. 



Another manuscript list of fossils from " Wheatlow Brook, near 

 Freshwater Church " (apparently the same locality), gives Ancil- 

 laria buccinoidcs, Cerithium concuvum, C. clcgans, C. mutabile, 

 Melanopsis fusif or mis, M. carinata, Naticu depressa, Ncrita aperta^ 

 Neritina concava, Paludina lentu, Cyrena obovata. These fossils 

 were collected aboul 1852.t In both cases the beds seem to 

 belong to the base of the Middle Headon Beds — the " Neritina 

 Bed " of the coast section. 



The well at Golden Hill Fort must have penetrated almost the 

 entire thickness of the Headon Beds, but unfortunately the record 

 of this well has been kept in such a way as to render it almost 

 useless for geological purposes. The section will be found in the 

 Appendix. 



Besides those mentioned, there were several temporary sections 

 near Freshwater, showing clays with Potaniomya and Paludina. 

 A well at Poundgreen, 7 chains north-east of the cross-roads, 

 seems to have reached the Headon Hill Sands. It showed : — 



Lower Headon J Green clay with Paludina and Potamomya. 

 Beds. \ Black clay with crushed Planorbis. 



Sand. 



The thickness of the beds could not be ascertained. 



Crossing the Yar, the old marl pits near the Yarmouth road 

 are in green clay, with Potamomya, — probably Lower Headon, but 

 no section is now visible. East of these pits the dip becomes high, 

 and there are no exposures for three miles. 



Near Little Chessell the beds again flatten somewhat, and 

 sections of the shelly Middle Headon Series can be seen extending 

 for several chains along the stream course about a quarter of a 



* Op. cit., p. 90. 



■\ I cannot learn definitely who supplied this list or who collected or determined 

 these fossils (though Mr. Bristow thinks it was the late Mr. W. H. Baily), and am 

 unable to find any place named Wheatlow Brook, near Freshwater. — C. R. 



