912 



J. PRESTWICH ON THE RANGE OF THE LOWER 



Section of the Artesian Well at Messrs. Meux Sf Co.'s Brewery, 

 Tottenham Court Road. London. 



Depth. 



Particulars of Well- 

 section. 



ft. Flint Gravel 



London Clay , 



Woolwich and Beading beds 

 156* Thanet Sands 



White Chalk, with flints ^ 

 more or less plentiful ; 

 a few fine seams of grey 

 clay in the lower part, )■ 

 and fossils often nume- 

 rous, especially in the 

 603* lines of bedding 



Compact light grey 

 Chalk, with few fossils. 

 Inoceramus 



Grey Chalk-marl, with "j 



Inoceramus Cuvieri and l 



812 Ammonites varians ...J 



Micaceous light grey ^ 



Sandstone,very slightly | 



calcareous (firestone). )■ 



Ammonites sjplendens .. | 



810 Green and quartzose sand ) 



Calcareous bluish-grey ^ 

 clay, with a few seams j 

 of calcareo-phosphatic 

 nodules. Ammonites \ 

 splendens, A. lautus, y 

 Inoceramus concentri- 

 cus, I. sulcatus, Dcnta- 

 lium medium, Belem- 

 nites idtimus, and wood,/ 



Greensand and clay 



Seam of calcareo-phos- "j 



phatic nodules and I 



1000 quartzite pebbles J 



Light-coloured limestone.. 



Seam of quartzite pebbles . 



Sandy limestone 



Light-colouredlimestone; | 

 traces of fossils J 



Marly sand 



Light greyish limestone, "j 

 with angular grains of 

 quartzose sand and a 

 few specks of chlorite 

 and mica. Numerous 

 casts and impressions )■ 

 of shells : — Cardium 

 Hillanum, Trigonia 

 alceformis, a small 

 Cerithium, Corals, and 

 Foraminif era ) 



Light grey oolitic-looking 1 



rock J 



1064 Bubbly stone and clay 



Mottled red, purple, and ^ 

 light green shales, very I 

 finely micaceous, and j 

 with well-preserved 

 fossils in places ; dips , 

 at an angle of 35°; a ■ 

 few thin seams of 

 1144 red and grey quartzite 



Thick- 



21ft. 

 63* 

 51 

 21 



447 



176 



<°5 



32 



157 



Geological Formation. 



For details of these beds \ 

 see Mr. Whitaker's | 

 "Geology of the Lon- )■ 

 don Basin," Mem. Geol. j 

 Surv. vol. iv. p. 525 ... ) 



Middle Chalk 



Lower Chalk 

 Chalk Marl .. 



28 Upper Greensand 



Gaul'i 



* 



29 

 1 



24 



2 

 3 



Lower Greensand 



)■ , 80 ; Upper Devonia 



Thick- 



156* ft. 



655* 



2S 



160 



64 



80 + 



