232 Geology. 



and spheroidal masses of dense hard grit more or less cal- 

 careous. We may here note that the Great Oolite on Lans- 

 down varies very much from that on the other side of the 

 valley ; all the softer and more workable beds are absent, 

 and some 20 ft. only of a denser, harder rock called "Bastard 

 Oolite " good for rough walling and rustic building, come in. 

 The characteristic fossils are Terebratula digona ; T. coarctata 

 common to this and the Bradford clay, T. maxillata and 

 Avicula echinata. Tracks of annelids are found in the 

 sandy films of some of the beds and the dotted markings of 

 a crustacean, or, as Prof. Phillips thought, the indentations 

 left by the progress of some bivalve opening and shutting its 

 shell. 



With this formation we take leave of our hills, as the 

 Cornbrash is rarely found in our immedate district, though 

 a faulted mass appears near Westwood ; it will, however, 

 be necessary to record a few surface or superficial peculi- 

 arities. 



Indications of the Tertiary period are found 



Tertiary period. 



on both sides of the Warleigh valley, but 

 especially on the Bathford side, where on the top of Farley 

 Down, 629 feet above the Avon, overhanging that pic- 

 turesque village, a large mass of Tertiary flints was de- 

 scribed by the writer {"Froc" B. N. H. and A. F. Club, 

 vol. iv., p. 82), filling one of the numerous joints in 

 the Great Oolite; veins of these rounded flints are also 

 sometimes found running down the fissures of the under- 

 ground quarries — remnants of the Tertiary period, if not 

 of the Chalk which may have once covered our hills. Cony- 

 beare also alludes to transported Chalk flints, as covering the 

 higher grounds on the Bathampton side. These fissures 

 have been found to contain bones of Bison, Ox, Horse 



