4 



Bradford Clay and its Fossils. 



ing, the Forest marble being visible, resting on the Great Oolite at 

 Pickwick and Wormwood. At Berefield the clay re-appears, con- 

 stituting a thick stratum, which may be traced from that village, by 

 Bradford, Upper Westwood, and Farleigh Castle : but through the 

 southern part of the district it is difficult to separate the Bradford 

 clay from the Fullers' earth." 1. It occurs occasionally still further 

 northwards, and may be seen along the line of railway near Kemble 

 in North Wilts, but in no place has it the same interest as in this 

 immediate neighbourhood. 



Section near Kemble Station, communicated by Professor Buckman, exhibiting the 

 manner in which the Bradford clay occasionally "thins out." 



The cutting of the Great Western Railway at the eastern end 

 of the Box tunnel, exhibits a good section of the Bradford clay, 

 but j in this locality it is much interrupted by bands of oolitic 

 limestone. It contains many fine Corals and Echini, which have 

 been carefully investigated by Mr. Kilvert of Bath, to whom the 

 Society is indebted for the loan of a beautiful series of these fossils, 

 now exhibited. 



Before describing more particularly the fossils contained in the 

 Bradford clay, it is necessary that I should make some reference 

 to the Great or Bath Oolite, on which the stratum rests, and 

 on which a portion of this town stands. This is a calcareous 



Geological section of the neighbourhood of Bradford, showing the general distribution of the strata. 

 Bd. Bradford. Bx. Box. L. Lias. I.O. Inferior Oolite. F.E. Fullers' Earth. G.O. Great 

 Oolite, b.c. Bradford clay. f.m. Forest marble. C. Cornbrash. m. Mammalian drift, a.d. More 



ancient drift. 



1 Transactions Geological Society, 2nd series, vol. iii. part 2. 



