﻿260 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 14, 



angle to the foregoing, was exposed in the excavation for Mr. Crax- 

 ford's House. (See Plan, fig. 1, a.) 



Fig. 3. — Part of the Section exposed in digging the foundation of 

 Mr. Craaford's House. 



Length 35 feet ; height 14 feet. The hase of the Section is on the Road, 105 feet 

 above low-water mark. 



a. Black earth, containing bones of Canis lupus and Sus scrofa, fragments of ancient pottery 



and iron arms ? 6 feet. 



b. Calcareous sandy marl. 



c. Lower portion of the same, with flint and fer-"| Marked with wavy lines of strati-"] g one g e( j 



ruginous sandstone boulders and pebbles, > fication, and containing Bones > ^ 5 



both angular and round. J of Mammalia. J 



d. Lower Greensand in situ. 



The whole of the "Bone Bed" appears to have been subjected 

 to the action of water, as the flints and grit-boulders, although an- 

 gular, are partially worn, and the chalk-nodules and softer pebbles 

 are completely rounded ; the stratification, also, of the marl, sand, 

 and boulders follows the irregularities of the Lower Greensand on 

 which they rest. 



There is no evidence that this deposit was of marine origin, marine 

 remains * not having been found in it ; on the other hand, the bones 

 of Mammals and the Snail-shells, with which it abounds, would in- 

 dicate its fluviatile or lacustrine origin. 



The presence of a breccia of chalk-flints, if so it may be termed, at 

 this spot is somewhat singular, no flinty chalk occurring at a less 

 distance than six miles to the north or east, and the grey chalk rising 

 between that member of the Cretaceous group and the "Bone-deposit," 

 and forming the 'highest ground of the whole district. 



The finer portions of calcareous marl and loam would, to a great 

 extent, appear to have been derived from the waste of the Chalk, the 

 marl possessing all the usual mineral characters of such sediments ; 

 and I have also found the little Terehratula rigida, so characteristic 

 of the Chalk, in the sandy loam. A microscopic investigation carries 

 this view still further, and favours also the idea of the probable iden- 

 tity of age and origin of the Bone-bed with the Brick-clay and Drift ; 

 the calcareous marl of the first-named deposit abounding with' Fora- 

 minifera and other microscopic organisms, many forms of which are 



* Excepting foraminifera, &c., of the Chalk, obviously derived from detrital 

 action. 



