290 



MR. H. B. WOODWAED ON A WELL-SINKING AT SWINDON. 



Kellaways 

 Eock. 



Dark laminated clay, with few fossils 



Greenish-grey shelly clay (with Perna), and 



dark unctuous clay 



Dark greenish, unctuous, shaly clay, shelly 

 Slightly calcareous sandstone and grey gritty 

 rock, with loose sand and clay, rich in 



fossils and iron pyrites 



Dense laminated and slightly sandy clay, 



with few fossils, and Septaria (containing 



water). The lower poi;tion of this stratum 



(1 foot) shows a decided change to sand... 



Greenish-grey gritty sandstone, with few 



fossils 



Greenish-grey calcareous sand8tone,few fossils 



•{ Greenish-grey clay, shelly in places 



Dark greenish-grey, unctuous, shaly clay . . . 



Soft greenish-grey sandstone 



Greenish gritty clay 



Hard, greenish-grey, calcareous sandstone, 



f ossiliferous 



Greenish-grey calcareous and gritty clay, 



shelly in places 



Greenish -grey sandy clay and gritty bed, 



shelly in places ,. 



Greenish calcareous sandstone, with mass of 



shelly rock 



Greenish sand-rock and loose sand, with 



clay-seams, shelly in places 



Greenish gritty sand-rock and loose sand . . . 

 Dark grey, laminated clay, shelly in places... 

 Dark grey, laminated clay, shelly n places, 



with nodules of iron pyrites 



\^ Grey gritty rock and loose sand 



/'Hard grey shelly limestone and dense grey 



I and somewhat gritty limestone, with layer 



•Cornbrash. \ of sandy marl (4 inches) 8 feet from base, 



I and layer of dvdl grey clay, with shells, at 



l^ depth of 702 feet 



f Clay, with a trace of fossils ; marly oolitic 

 bed with ochreous galls at depth of 705 

 feet, and hard greenish-grey marl at 708 



and 709 feet 



Clay 



Grey shelly oolitic limestone 



■{ Grey marl 



j Grey shelly oolitic limestone 



I Hard marl, with band of shelly Hmestone ; 



fragments of lignite 



IClay 



I Pale grey earthy and shelly limestones 



l^Grey shelly marl 



The boring was ultimately (December 23rd, 1884) carried 

 to a depth of 



Thickness. 



ft. in. 



6 



2 3 

 3 



Depth. 



ft. in. 

 637 10 



2 5 



3 3 



7 11 



2 

 7 



6 



1 5 

 1 



3 2 

 1 4 

 1 2 

 1 5 



4 1 

 1 2 



7 



5 4 

 10 



18 3 



[Forest- 

 marble 

 (base not 

 reached). 



640 

 640 



642 9 



646 



653 11 



655 11 



656 6 



657 



658 5 



659 5 



662 7 



663 11 



665 1 



666 6 



670 7 



671 9 

 678 9 



6 

 684 11 



703 2 



8 4 



711 6 



4 OJ 



716 6^ 



1 ^i 



716 10 



2 1 



718 11 



2 8 



721 7 



2 4 



723 11 



4 10 



728 9 



2 



730 9 



3 



731 



736 2 



