408 ME. L. RICHARDSON ON THE INFERIOR OOLITE [Nov. I907, 



Stone of Ham Hill. 1 The equivalent of the Doulting Freestone, 

 however, is present as a limestone-deposit at Midford. 



Mr. H. B. Woodward noted, but !in less detail, nearly the same 

 section as I did myself. 



The Upper Trigonia-Grit is unmistakable at Midford. In the 

 lower portion, as was pointed out by Mr. Winwood to the members 

 of the Geologists' Association, it is conglomeratic in places, and 

 some of the pebbly material fills up inequalities in the hard sandy 

 limestone immediately below, to which it is usually adherent. 



The Upper Coral-Bed is well exposed, and similar in all respects 

 to its equivalent at Dundry ; at Worgan's Quarry in the Slad Valley, 

 near Stroud ; and the (unfortunately, only temporary) section at 

 Timsbury Sleight. Particular attention may be directed to the 

 important micro-fauna of this widespread deposit. 



The upper portion of the Upper Trigonia-Giit is slightly bored, 

 and there are oysters in places on the surface. These phenomena 

 are generally indicative of a non-sequence, and here, indeed, the 

 Dundry Freestone is absent. 



Above the Coral-Bed are the Doulting Beds. Lonsdale described 

 them in the neighbourhood of Bath as ' soft freestone more or less 

 oolitic," and assigned to them a thickness of from 40 to 50 feet. 

 At Midford, however, they certainly do not exceed about 25 feet in 

 thickness. 



The Doulting Stone is very massive, and is quite distinct from the 

 overlying Anabacia-Limesiones. In these latter there is usually 

 a thin well-marked limestone-band, in which the characteristic coral 

 is very abundant; and, being harder than the beds immediately above 

 and below it, this limestone stands out conspicuously in roost of 

 the sections, which can therefore be read almost as soon as one 

 enters a quarry. 



At the very base of the Fullers' Earth, and resting directly upon 

 a bored and oyster-covered surface of the Anabacia-Limestoiie, is a 

 bed crowded with Terebratula globata, auctt. A similar deposit 

 occurs near the Avoncliff Aqueduct, and it is somewhat difficult, 

 from the evidence obtainable in this area, to know whether to class 

 it with the Inferior Oolite or with the Fullers' Earth. In a quarry 

 near Great Bissington, near Burford (Oxfordshire), there is a similar 

 deposit resting upon the Clypeus-Giit (and at the very base of the 

 Fullers' Earth) from which I have obtained Clypeus Ploti. For this 

 reason I group the bed wdth the Inferior Oolite. 



The top-portion of the Oolite and the overlying Fullers' Earth are 

 well exposed in the railway-cutting to the south, and therefrom a 

 number of fossils have been obtained from time to time. 



The neighbourhood op Radstock. 



In certain of the railway-cuttings near Wellow the post- 

 Garantiame Inferior-Oolite deposits are very similar to their 

 equivalents at Midford ; but, according to Mr. S. S. Buckman & the 



1 J. Buckman, Quart. Journ. Geol. Soc. vol. xxxv (1879) p. 737. 



