140 Mr Tawney, On the Upper Bagshot Sands of [Nov. 28, 



(2) On the Upper Bagshot Sands of Hordwell Cliffs, Hamp- 

 shire. By E. B. Tawney, M. A. 



These sands appear in Hordwell Cliffs — at that part locally 

 designated Long Mead End — and extend to a little W. of Beacon 

 Bunny, where they run out at the top of the cliff. By old observers 

 they were sometimes termed the " Estuarine-bed of Long Mead 

 End" to distinguish them from the Marine Barton Clays below, 

 and the more freshwater Lower Headon beds above. They have been 

 recognised by most observers — from their position — as identical 

 with similar sands in the Isle of Wight which come immediately 

 below the Lower Headon beds. We will first refer to some of the 

 older authorities who have treated of the district. 



1814. T. Webster. On the Freshwater Formations of the Isle 

 of Wight, with some observations on the Strata over the Chalk in the 

 South-east part of England. Trans. Geol. Soc, 1st Ser. n. p. 161, 

 pi. 9 — 11. In the map of the district all the "strata above the chalk" 

 are coloured with one tint. In his very excellent coloured section 

 of the coast between Headon Hill and Alum Bay in the Isle of Wight, 

 these Upper Bagshot sands are indicated by a capital letter D. No 

 details are given concerning them [p. 184] in the letter-press. 



1822. A.Sedgwick. On the Geology of the Isle of Wight. Annals 

 of Phil., New Series in. p. 329. Prof. Sedgwick having apparently 

 lost his specimens and notes writes from memory, aided by memoranda 

 made by his companion, Dr Whewell. On pp. 314, 348 he mentions 

 that these " sandy strata contain a few marine shells, among which 

 we remarked some very large Oerithia." He recognises the general 

 parallelism of the Barton and Hordwell Cliff section to that of White 

 Cliff Bay, though owing to the Barton clay at this time being uni- 

 versally confused with the London clay, the account of some of the 

 beds is a little puzzling. The Lower Headon (freshwater) beds above 

 the sands are recognised. 



1824. T. Webster. On a Freshwater Formation in Hordwell Cliff, 

 Hampshire, and on the subjacent beds from Hordwell to Muddiford. 

 Trans. Geol. Soc, 2nd Ser. I. p. 90. After describing the freshwater 

 Lower Headon [p. 93] we read " immediately below this formation at 

 Hordwell is found a bed of sand from 60 to 100 feet thick, which 

 appeal's first about Long Mead End, and may be well observed in the 

 section at Beacon Bunny." The thickness is exaggerated, and the 

 passage following as well as his section [pi. XII. fig. 1] shows that he has 

 taken into it some of the Barton sands which are really separated by the 

 Beacon Bunny clay, &c. The equivalence of the Hordwell "lower 

 freshwater formation " [L. Headon] to that of the Isle of Wight is 

 deduced from their both lying on this bed of sand, in which in some 

 places intervenes a bed with a mixture of marine and freshwater 

 shells. 





