52 



ME. L. KICHAKDSON ON THE EHJETIC OF [Feb. I9II. 



not have come from one horizon, 1 I am satisfied (after an examina- 

 tion of the specimens in the Bath Museum) that all so labelled did 

 come from one horizon, and feel little doubt that that horizon is 

 Bed 13 or the Pleurophorus Bed of West Somerset. 



Pig. 4. 

 Diagrammatic Section of the Quarry at Fivehead. 



6 ins\ 



The section in the railway-cutting between Hatch Beauchamp 

 Station and the tunnel was originally investigated by Moore, 2 and 

 later by Mr. H. B. Woodward. 3 The Westbury Beds are 22 feet 

 2 inches thick, and at 11 feet 10 inches above their base occurs the 

 stratum that Moore identified with his ' Flinty Bed.' As has been 

 remarked, it is unfortunate that he did not record any specimens 

 therefrom. 4 The Cotham Beds are thus constituted here : — 



Thickness in feet inches. 

 [1. Position of the Cotham Marble.] 



2. Light-blue marl 3 



3. Grey stone with darker layers 1 2 



4. Grey marl and stone 7 



In the Geological Survey Memoir on the district, in which an 

 abbreviated edition of Moore's record is published along with an 

 excellent sketch-section, Mr. Woodward remarks (p. 26) that 



' it may be questioned whether the " grey stone with layers of darker colour " 

 and overlying " light blue marl" should not be placed with the White Lias.' 



I think, however, that the interpretation given above is correct. 

 The Langport Beds are only 9 feet 4 inches thick here, according 

 to Moore, so they have decreased considerably in thickness. 



About half-way between Stoke St. Mary and West Hatch is a large 

 quarry, in which the uppermost strata of the Langport Beds and the 



1 ' The Geology of the Country between Wellington & Chard' Mem. Geol. 

 Surv. 1906, p. 27. 



2 Q. J. G. S. vol. xxiii (1867) p. 469. 



3 ' The Geology of the Country between Wellington & Chard ' pp. 25-26. 

 i Ibid. p. 27. 



