INFERIOR OOLITE. 293 



Abbas (known as Prof. Buckman's quarry) was noted by Mr. 

 Hudleston : — 



Ft. In. 

 r a. Whitish limestone in beds which are not very fossil- 

 Zone of iferous, though A. Parkinsoni occurs rarely, and 



Ammonites i mostly towards the base 6 6 



Parkinsoni. j b. Marl bed with Terebratiila Morieri and Rhynchonella 



I parviila o 6 



A ]li'un^hy ^> "^^ "^'^^ "rotten-bed" with large Astaiie. Very small 

 ' [-'"...'."^^'i ammonites ; thickness variable. About o 6 



/. Irony stone o 6 



The great shell-bed of Bradford Abbas with 



laniis. 



Zone of o g -( ^- concaznis m abundance, and many speci- 



^ ^ c^ \\\tt\\%oi A.Soweybyi,tic. Full of univalves. 



A. Minrhi 

 sonce. 



{fi-^y A yellowish ironshot oolite 2 o 



f. The Pavingstone or Mnrchisona-'htA proper i i 



^p-. The "Dew-bed" i 2 



Total thickness in quarry 12 3 



The neighbourhood of Bridport, like that of Sherborne, is 

 exceedingly rich in Inferior Oolite fossils, and here again the 

 "fossil beds" now occur in the zone of A. Parkinsoni, and now 

 in that of A. Humphriesianus, while the lower zones are generally 

 well developed and rich in specimens of A. concavus, etc. In 

 this district have been obtained most of the fine examples of 

 Ammonites Parkinsoni, of which cut and polished specimens are 

 to be seen in many collections. 



The quarries near Beaminster, at Powerstock, Loders, Chideock, 

 and Bridport are well known to collectors ; but perhaps the cliffs 

 and quarries at Burton Bradstock, east of Bridport Harbour, have 

 been chiefly examined. Here the Inferior Oolite, altogether about 

 15 feet in thickness, rests on the yellow sands which form such 

 striking features in the clifts. The Oolite has been divided as 

 follows (see Fig. 40, p. 252) : ' — 



Pale and brown oolite with Ammonites Parkinsoni, A. stibradiaius, Tere- 

 bratiila Phillipsii, Collyritcs ringcns, Holectypits hemisphcericus, etc. 



Brachiopoda-bed : containing in great abundance Terebratiila splurroidalis ; 

 also IValdkeimia carinata. 



Brown and iron-shot oolite, with A. coneavus, representing the zones of A. 

 Humphriesianus, A. Sowerbyi, and A. MurchisoncE. 



Sands representing the zones of A. opaliniis and A. Jurensis. 



The zone of Ammonites Humphriesianus, which is to be found in 

 some quarries east of Bridport, does not appear to be distinctly 

 developed at Burton Bradstock, although the species is met with 

 in the cliffs and road-cutting. Dr. INI. Poignand, who visited the 



^ Wright, Q. J. xii. 312, xvi. 47 ; R. Damon, Geol. Weymouth, etc. (1884) 

 p. 226, with notes by R. Etheridge. See also Rev. G. F. Whidborne, Q. J. 

 xxxix. 487 ; Prof. W. J. Sollas, Ibid. 541 ; and T. Davidson, Proc. Dorset Nat. 

 Hist. Club, 1877. 



