PROCEEDINGS COTTESWOLD CLUB 



1913 



DESCRIPTION OF THE ROCKS PASSED THROUGH BY THE 

 BORE-HOLE AT KEMBLE 

 (Bore-hole, 353 feet deep). 

 Line-Level. — 356 feet above ordnance-datum. 

 Well (through embankment), 27ft. 6 ins. deep. 

 Top of bore-hole. — 328 ft. 6 ins. above ordnance-datum. 



Great / i. Pale yellow oolitic limestone with a few 

 Oolite (^ shell-fragments and small gastropods 



Limestone, hard, blue-black (with 

 sporadically-distributed yellow oolite- 

 granules) separated by layers of some- 

 what sandy rock 



Sandstone, grey, fine-grained, micace- 

 ous, calcareous, compact in some 

 places, fissile in others 



Marls, grey, sandy in places, with very 

 shelly layers ; Rhynchonella, Chlamys 

 vagans (Sow.), Psendomonotis, Volsella 

 imbricata (Sow.), etc. . . 



Marls, similar in many respects to those 

 composing bed 4. The upper part is 

 sandy and indurated, the lower more 

 marly, and when dry from e-xposure, 

 breaks up with a conchoidal fracture 

 into irregular pieces. Some very 

 shelly layers occur, being crowded 

 with crinoid-ossicles and specimens 

 of Ostrea acuminata (Sow.) 



/■ 6. Riibbly Beds. Ragstone, rubbly, shelly, 



bluish ; Terebratula globata auctt. 



(common) Rhynchonella, Syncyclonema, 



etc. 

 White Oolite. Limestone, bluish, oolitic 

 Clypeus-Grit. Ragstone, rubbly, shelly ; 



usual fossils 

 Non-sequence. Upper Coral-Bed and 



Dundry Freestone wanting. 

 Upper Trigonia-Grit. Ragstone ; usual 



fossils 

 Non-sequence. All the beds of the 



hemerae niortensis to bradfordensis 



(incl.) wanting . . 

 Lower Freestone. Top-bed well bored 



by annelids 

 Pea-Grit. Limestone, bluish, pisolitic . . 

 Non-sequence. Lower Limestone, Scis- 



sum- and Opaliniforme-'Beds, wanting. 



Cephalopod-Bed. Yellowish-brown, 

 ironshot, marly limestone 



Cotteswold Sands. The upper 17 feet 

 are greyer and more compact than the 

 lower deposits ; penetrated . . 



Bottom of bore-hole. — 24 ft. 6 ins. below ordnance- 



Thickness 



of rocks. 

 Ft. Ins. 



60 o 



Depth from 



top of bore-hole. 



Ft. Ins. 



60 o 



70 O 

 82 O 



26 o 108 o 



73 o 



4 6 

 15 o 



185 6 

 200 6 



7 o 207 6 



6 o 213 6 



