1881.] Hordwell Cliffs, Hampshire. 141 



1829. C. Lyell. On the Freshwater Strata of Hordwell Cliff, 

 Beacon Cliff, and Barton Cliff, Hampshire. Trans. Geol. Soc, 2nd Ser. II. 

 p. 287, pi. xxx. A detail description is given of the freshwater 

 Hordwell beds [L. Headon], and a coloured section [pi. xxx. f. 2] 

 of the coast shows their disposition in the cliffs. The sands in question 

 are described [p. 290] as No. 9 ; "white siliceous sand, without shells, 

 rises near Long Mead End and extends through Beacon and Barton 

 Cliffs to the middle of High Cliff." This is a repetition of the error in 

 Webster's section. He misses their fossil contents apparently. Classifying 

 them in the lower freshwater, he makes them extend too far to the west. 

 They do not extend to Barton, much less to " about the middle of High 

 Cliff." He further is in error in stating that "no portion of the upper 

 marine formation [M. Headon] exists anywhere in this part of the 

 Hampshire coast." 



1838. D'Archiac. Note sur les sables et gres tertiaires. Bull. 

 Soc. Geol. Fr.y S. i. t. ix. p. 54. After a description of the French 

 beds of Barton age notices shortly these sands at Hordwell, and attributes 

 a marine origin to them rather than freshwater. 



1839. DArchiac. Essais sur la coordination des terrains tertiaires 

 du nord de la France, de la Belgique et de lAngleterre. Bull. Soc. 

 Geol. Fr., Ser. I. t. x. p. 169. Mentions the lower freshwater at Hordwell 

 reposing on these sands, which are correlated with the "sables moyens" 

 [pp. 172, 200, 208]. 



1846. S. Wood. On the discovery of an Alligator and of several 

 new Mammalia in the Hordwell Cliff, with observations upon the 

 Geological Phenomena of that Locality. Charleswortli 's Geol. Journ. I. 

 p. 1. It is here shown that Lyell must have missed the upper marine 

 [M. Headon], for it was recognised as a bed 10 inches think, and its 

 fossils were collected by himself and Mr Edwards. He next corrects 

 Lyell's view of the extent of the freshwater formation towards Barton. 

 Our Upper Bagshot sand is described [p. 4] as coming below the fresh- 

 water deposit, and characterised as a " greyish- white or light-coloured 

 "sand, containing the following molluscous genera, some species being 

 " extremely abundant : Oliva, Potanddes, Ancillaria, Natica, Melania, 

 " Melanopsis, Pleurotoma, Bulla, Mactra, Cyrena, Corbula, Sanijuinolaria 

 " [Psammobial], V enericardia, Cytherea, Lucina, Potamomya. The bed 

 " appears to be intermediate between the London [Barton] clay and 

 " the lower freshwater, and must be referred to an estuary formation, 

 "for the largest proportion of its Testacea are referable to marine genera." 

 He then proposes to term it the "Lower Marine" in opposition to 

 the " Upper Marine," but the inadmissibility of such a term is 

 apparent. 



1846. J. Prestwich. On the Tertiary or Supracretaceous Forma- 

 tions of the Isle of Wight as exhibited in the Sections at Alum Bay 

 and White Cliff Bay. Q. J. G. S. II. p. 223. We read, p. 227, "At 

 Hordwell Cliff, on the top of the London [Barton] clay, there is a bed of 

 sand fifteen feet thick overlaid by a few inches of grey clay." In the 

 section [pi. ix. f. 1] from Alum Bay to Heatherwood Point, Isle of 



