1S81.] Hordwell Cliffs, Hampshire. 143 



M. Headon] is described bed by bed. The sands in question are said 

 p. 128] to rise about 300 yards W. of Long Mead End and run out at 

 Beacon Bunny, inclined at an angle of 2°. They are divided into No. 16, 

 greyish-white sand scarcely coherent, the fossils not well preserved ; 

 the 14 genera cited have been previously mentioned by S. Wood: one 

 specific name Lucina divaricata is mentioned. Thickness of the grey 

 sand 5 feet, and it passes gradually into No. 17, of which it may be 

 considered to form the upper fossiliferous portion. No. 17, fine 

 white sand, non-fossiliferous ; estimated at 15 to 20 feet. Much im- 

 portance is attached to the fossil contents from the light which they 

 throw on the conditions under which the [equivalent] Headon Hill 

 sands were deposited, being probably of estuary origin. [We may add 

 that the upper freshwater [U. Headon], as described by Dr Wright, 

 above the "upper marine" does not exist at Hordle; probably some of 

 the L. Headon, the position of which has been mistaken, are referred to.] 



1853. E. Forbes. On the Fluvio-marine Tertiaries of the Isle of 

 Wight. Q. J. G. S. IX. p. 259. In this important paper, which first an- 

 nounced the distinctness of the Hempstead [Hamstead] series from the 

 Headon Hill beds, and confirmed the identity of the Colwell Bay and 

 Headon Hill marine beds, there is a mention, p. 268, of the sands below the 

 "lower beds of the Headon series. No fossils have hitherto been re- 

 corded from these beds or the Isle of Wight. At White Cliff Bay how- 

 ever, to all appearance barren, they are highly fossiliferous, containing 

 "abundant impressions of marine shells, apparently of Barton species. 

 "The shelly matter has entirely disappeared... the specimens are quite 

 " untransportable." 



1856. E. Forbes. On the Tertiary Fluvio-marine Formation of 

 the Isle of Wight. Memoirs of the Geological Survey of Great Britain. 

 This Survey Memoir, giving the details on which the conclusions of the pre- 

 ceding paper were founded, contains the following passage, p. 86 : "The 

 " lower beds of the Headon series rest upon sands known as Headon Hill 

 "sands, which are the equivalents of the Upper Bagshot beds... these 

 "sands rest upon the Barton clays or highest portion of the Middle 

 "Bagshot group." 



1856. J. Prestwich. On the Correlation of the Eocene Tertiaries 

 of England, France and Belgium, Part II. Q. J. G. S. xin. p. 89. 

 At p. 108 we read, "In the Barton series I would now include the 

 "siliceous sands at the base of Headon Hill and at the top of Barton 

 "Cliff. For though they contain no organic remains at those spots, casts 

 "of marine shells, apparently of the same species as those in the under- 

 " lying clay occur in considerable numbers in parts of the sands occupying 

 "the same position at White Cliff Bay ; whilst at Barton, as the deposit 

 "ranges eastward towards Hordwell Cliff, these sands alternate with fos- 

 "siliferous grey clays, and form with them passage beds between the 

 "purely marine and compact Barton clay and the freshwater beds nearer 

 "Milford." p. 109, "At the Barton section a thin bed of sand, full of 

 "estuarine shells, is interposed between the Barton sands and the fresh- 

 " water clays." [L. Headon.] 



