98 MESSES. JUKES-BEOWNE AlfD SCANES ON THE [Feb. I9OI, 



the Gault is certainly present, and is probably from 80 to 90 feet 

 thick ; that above the Gault is a dull grey micaceous and calcareous 

 Malmstone, which passes up into fine grey micaceous sand ; and 

 finally, that there is glauconitic sand which weathers yellow or buff. 

 Kear Maiden Bradley the easterly dip is modified by the anti- 

 clinal flexure of the Warminster district ; and, as a consequence, the 

 local dips have a southerly direction. 



The general succession below the outcrop of the Melbourn Rock 

 is as follows : — 



Feet, 

 Lower Chalk with hard Chloritie Marl at the base . . . 200 



^ ( Sands with calcai*eous concretions o to 8 



"^ I Sands with siliceous concretions (cherts) 20 to 24 



§ j Coarser green sands about 15 



§ I Fine grey and buff micaceous sands ,, 120 



a I Sandy Malmstone „ 15 



^ (^ Dark-grey marl and clay (Gault) 90 



KiMERiDGE Clay, Coralll-vn, and Oxford Clay. 



III. ExposTiEEs OF Gault. 



Although the Gault does not exactly come within the scope of 

 this communication, it will be as well to mention such indications 

 of its existence as we have seen, because it forms the lower part of 

 the Selbornian Stage, though it is only about half as thick as the 

 Upper Greensand into which it passes. 



The Gault is nowhere well exposed, for it only comes to the 

 surface in a narrow band along the steep slope of the outer escarp- 

 ment, and again as a small inlying tract at the bottom of the deep 

 valleys which trench the Greensand plateau west of Stourton, 



Its base has not been seen, for, as it lies on Oxford Clay, it makes 

 no feature. Its highest part, consisting of a grey or greenish 

 micaceous clay, has been seea in places beneath the Malmstone ; 

 this seems to pass down into a stiff dark-grey clay, which is almost 

 black when wet. 



In Bradley Wood, about a mile north-west of Maiden Bradley, 

 springs seem to be thrown out at or near the base of the Gault. 

 Near the Keeper's Lodge, and just below the 500-foot contour-line, 

 there is said to be blue clay beneath 3 feet of soil ; while north 

 of Katesbench Farm, at about 550 feet, Malmstone is seen. 



In the valley north of Maiden Bradley, and immediately below 

 the outcrop of the Malmstone, about 10 feet of dark-grey clay was 

 exposed by the fall of a large tree. 



IV. ExposTJEEs OF Malmstone and Micaceous Sands. 



The main outcrop of these beds is also a narrow tract, despite 

 their great thickness ; they form the steeper part of the slope of 

 the escarpment, and exposures in them are few and far between. 



The most southerly place where we have seen them is on 

 Kingsettle Hill, south-west of Alfred's Tower, where a 

 sand-pit exposes about 40 feet of buff-coloured sand. The Malm- 

 stone is not seen, but there is wet ground near Hilcombe Lodge at 



