INFERIOR OOLITE SERIES : UUNDRY. 99 
radians and Lima toarcensis, which were identified by Messrs. 
Sharman and Newton. The sand-burrs rest on a layer of iron- 
shot conglomeratic limestone, the matrix of which lithologically 
much resembles the Gloucestershire Cephalopoda-bed. From this 
layer Mr. Winwood obtained specimens of Ammonites communis, 
A. bifrons, and Rhynchonetla Moorei. The bed is to some extent 
remanie, and it evidently corresponds with a " nodular " iron-shot 
bed noticed by Mr. Winwood at the ba?e of the Midford Sands, 
near Devonshire Buildings, Bath.* 
The Inferior Oolite of Dundry Hill has attained much repute 
as a fossiliferous development of the bed^, and this is largely due 
to the Bristol geologists who have for many years collected 
specimens from this locality. Many descriptions of the strata 
and their fossils have been published ; but it is mainly from the 
Lower Division of the Inferior Oolite that the fossils have been 
obtained.f 
There is no continuous section of the beds, and they must be 
studied in several disconnected quarries and cuttings ; moreover, 
the beds are somewhat disturbed if not faulted. The following 
is a general account of the series : 
The Building or Freestone Beds occur on top of the series, and these are 
exposed in quarries and underground workings to the south-west of the 
church. They comprise hard flaggy and irregular brown limestones, 
resting on more massive layers of sandy limestone, the whole being 
imperfectly oolitic, and some of the beds being sparry in nature and 
resembling the Doulting Stone. The beds are about 15 or 16 feet thick ; 
and the best stone is said to occur at the base. Few fossils occur, but 
Mr. Etheridge notes several species of Corals, and casts of Trigonia. 
Ragstones (including the Conchifera-'beds of Mr. Etheridge) ; east of the 
School, by the main road from Bristol to Chew Magna, and again further 
north on the brow of the hill, the following beds may be traced : 
FT. IN. 
Flaggy and earthy limestone with the lenticular masses 
of Coral-rock, Isa^trcca, Montlivaltia, Thamnastrcea, 
Ostrea gregaria ; resting on rubbly beds, marls and 
clay, with irregular beds of marly limestone, yielding 
Terebratula globata, spines of Echini, &c. - 6 
Compact limestone with Anuelide-borings - 7 
Among other fossils recorded from this upper portion of the Inferior 
Oolite are Ammonites subradiatus, with its operculum in situ (a specimen 
described by S. P. Woodward), J Terebratula spliocroiddlis (original specimen 
figured by Sowerby), Rhynchonella spinosa, &c. (See p. 125.) 
The above beds may be regarded as belonging to the zone of Ammonites 
ParTcinsoni, and their full thickness probably exceeds 40 feet. The zonal 
Ammonite, as Mr. E. Wilson has stated, is of extreme rarity. 
Iron-shot limestones (including the " Mollusca or Shelly Bed," and the 
" Ammonite Bed "). Beneath the compact limestone, before noted, there 
may be traced at the same locality, nearly 5 feet of hard brown iron-shot 
limestones ; and similar beds, with ochreous clayey layers, were exposed 
* Geol. East Somerset (Geol. Surv.), p. 115 ; and Winwood, Proc. Bath Nat. 
Hist. Club, vol. vii., p. 337. 
t De la Beche, Mem. Geol. Surv., vol. i. p. 255 ; Etheridge, Quart. Journ. Geol. 
Soc., vol. xvi. p. 22 ; Tawney, Proc. Bristol Nat. Soc., ser. 2, vol. i. p. 9 ; Hudlcston, 
Inf. Ool. Gasteropoda, pp. 22, 56; and S. S. Buckman, Proc. Cotteswold Club, 
vol. ix. p. 374; Quart. Journ. Geol. Soc., vol. xlix. p. 508. 
Geologist, vol. iii. p. 328. 
G 2 
