100 



G. W. Colenutt — Note on the Osborne Beds. 



but there are some eight or ten feet (vertical measurement) of strata 

 at the base of the upper division of the series (the St. Helen's 

 Sands of Forbes) which are rich in fossils in some localities. In 

 consequence of the soft nature of the clays, retaining or sea walls 

 have been built nearly all the way from Kyde to Sea View, and, 

 unfortunately, as it is here found, generally speaking, a short 

 distance above or about high-water mark the fossiliferous band is 

 obscured hy the walls, the outcrop, roughly speaking, being about 

 horizontal between the two places. Only four localities where these 

 beds can be examined are at present known, namely, at Sea View 

 (here often covered up by sand and shingle), at Eyde House (now 

 mostly obscured by an old 'founder' of the low cliff), at Binstead 

 House (an imperfect exposure), and at Chapelcorner Copse, just 

 west of Wootton Creek. This last is by far the best section, and 

 we will take it as representing the others. 



The ledge of rocks just above low- water mark is the limestone of 

 the Osborne Series, forming the topmost division of the ' Nettlestone 

 Grits ' of Forbes ; and tracing the strata in ascending order from this 

 base we have the following series of beds : — 



Section showing the succession of the Osborne Series from the Osborne Limestone at 

 the base to the Bembridge Limestone at the top. (Fig. 4 of this section is the 

 bed which has yielded the small Glupea vectensis and the Crustaceans described 

 by Dr. H. Woodward.) 



Vertical Estimated Measurements. 



1. (Bed 6 in my paper, Geol. Mag., 1888, p. 359.) Dense clay, 

 green and brown mottled, about 4 feet ; no fossils whatever, as far 

 as I am aware. 



2. (Bed 5 in my paper, op. cit.) A series of clays of fluviatile 

 origin, about 6 feet. At the base is a dark blue or blackish seam, 

 about 2 inches thick, of finely comminuted shells mixed with 

 carbonaceous clayey particles. This seam has yielded bones of 

 Trionyx, teeth, etc., of Alligator Hantoniensis, bones of Amia Anglica 

 (vide Mr. Newton's paper), also the jaw of Amia Colemdti, scales of 



