METER — THREE DATS AT FARRINGDON. 



7 



a. Fine ash-coloured sand, regularly stratified, very like the sands 



with clay beneath the ironstone of Furze Hill 4 feet. 



b. Dark-brown and ferruginous sand, with a mixture of small pebbles, 



Bryozoa, Terebratulse, etc, regularly stratified 4 feet. 



c. Ditto, ditto, with two or more bands of hard calcareous concretions, 



each about eight inches in thickness . . . , 5 feet, 



This last was the lowest stratum exposed, but, from the appearance 

 of the soil, the pebbly sands extended somewhat lower. 



In the looser materials composing the strata b, c, we immediately 

 recognized the upper portion of the Red-gravel of East pit, contain- 

 ing here, as there, Bhynchonella nuciformis in abundance, B. latis- 

 sima, B. depressa, Terebratella Menardi, Terebratula Tornacensis, T. 

 depressa, more rarely ; and, in addition, a few specimens of Terebra- 

 tella oblonga, Sow. 



In the intermediate stone-beds, c, T. oblonga was not uncommon, 

 associated more rarely with B. depressa, T. Menardi, T. depressa, 

 and T. Bobertoni, D'Arch. The stone also contained Avicula Bau- 

 liniana, D'Orb., Pecten Bauliniana, D'Orb., JP. orbicularis, JExogyra 

 conica, var., and JE. haliotoidea, — shells which occur in the " Bargate 

 Stone" and "Pebble-beds" of Godalming. Iu fact, except for the 

 greater abundance of organic remains, this section agrees precisely 

 with a section exposed in a quarry of the Lower Greensand near 

 St. Katherine's Chapel, Guildford, where "pebble-beds" alternate, 

 for a thickness of twenty feet or more, with layers of the " Bargate 

 stone." 



I was greatly pleased at finding Terebratella oblonga here in 

 such comparative abundance, associated with T. Menardi, etc., as I 

 had only met with a single specimen in the Sponge-gravel. Yet, 

 what seemed to me to be of greater interest in this Badbury Hill 

 section was the upward passage of the dark-coloured pebbly strata b 

 (Red-gravel) into a, — thus, as it were, limiting the position of the 

 Sponge-gravels within a definite vertical range ; the fine sandy strata, 

 a, underlying the ferruginous sands with chert and ironstone as well 

 here as at Furze Hill and Earringdon Clump. 



Our time being limited, we now returned towards Earringdon, re- 

 visiting the pits at Little Coxwell, and again examining the junction 

 of the Sponge and Red-gravels in East pit. 



Erom what I have now seen of the several sections in the neigh- 

 bourhood, I can form but one opinion as to the position of the Sponge- 

 gravels with relation to the surrounding deposits, viz. that the true 

 "Sponge-gravel" of the Windmill-pit is unquestionably the oldest 

 of the Cretaceous deposits near Farringdon, the strata exposed in the 

 sections" at East Pit and Badbury Hill .(see sections 2, 3), forming, 

 as nearly as possible, a continuous series ; while at the same time 

 there is no reason to doubt that the fossiliferous concretions capping 

 Eurze Hill are identical with the ironstone concretions which occur 

 near the top of Badbury Hill, intermingled, here and there, with the 

 cherty fragments. In offering so strong an opinion on this subject, 

 I am, however, willing to confess, that had I not seen the actual junc- 



