406 ME. L. EICHAEDSON ON THE INEEEIOE OOLITE [NOV. I907, 



(D) Mells-Lane Quarry, Huish. 



Thickness in feet inches. 



II. Anabacia- a. Limestone, rubbly, oolitic ; seen 3 6 



Limestones, b. Limestone, white, oolitic ; Anabacia com- 



planata 9 



c. Limestone, rubbly, white ; Anabacia, Pli- 



catula (?) Sollasi, Whidborne, Serpula... 2 1 



III. Doulting Limestones, massive ; seen 4 



Stone. 



(3) The Kadstock-Bath Area. 



This area extends from Radstock to Bath, and from near Bradford- 

 on-Avon to Timsbury Sleight. 



Throughout it, the Upper Tri.gonia-Grit forms the basement-bed 

 of the Inferior Oolite. Above this bed in the Timsbury-Sleight 

 outlier and at English Combe, and therefore presumably along a 

 narrow tract of country near the escarpment between the latter 

 place and Tunley (near Timsbury) as well, comes the Dundry Free- 

 stone ; but elsewhere it is absent, and therefore has a very restricted 

 geographical extent. Far more extensive is the Upper Coral-Bed, 

 which has been exposed at Clan Down. Midford, Claverton, English 

 Combe, and Timsbury Sleight. The Doulting Stone and Anabacia- 

 Limestones are persistent over the whole area ; but the distribution 

 of the Rubbly Beds is somewhat sporadic. 



The chief sections of the Inferior-Oolite rocks are two in number. 

 One — a permanent section — occurs by the side of the main road at 

 Midford ; the other — a temporary one — has been recorded in a trial- 

 shaft on Timsbury Sleight. 



(A) Midford. 



The section by the side of the main road south of Midford Station 

 was visited by the Geologists' Association in 1893. Here the 

 bottom-bed of the Inferior Oolite, as usual in this area, is the 

 Upper Trigonia-Giit or i Hollow Bed ' as it is locally called. The 

 Upper Coral-Bed, Doulting Stone, Anabacia-'LimestoTies, and Bubbly 

 Beds (the last-named very thin), succeed, and are followed by the 

 Fullers' Earth (see Table II, facing p. 408). 



The Upper Trigonia-Gxit rests directly upon the Midford Sands, 

 and, by following the line of railway to the north, through the 

 Combe-Down Tunnel, the Lyncombe cutting, and the short tunnel 

 under the hill on which stand Devonshire Buildings, successively- 

 older deposits are traversed. 



In the approach-cutting to the western end of the tunnel under 

 Devonshire Buildings the Rev. H. H. Winwood observed blue clays, 

 and in the tunnel, at a distance of 50 yards from the mouth, a 

 large block of stone, oolitic and ferruginous outside, 7 to 12 inches 

 thick, evidently in situ (Proc. Bath Nat. Hist. & Antiq. F.-C. 

 vol. iii, 1874-77, pp. 132 et seqq.). He writes : 



' From this I obtained a specimen of Ammonites serpentinus characteristic of 

 the Upper Lias. This block rested on the light-bine clays,' 



