FEOM THE GREAT OOLITE. 171 



Prof. Duncan Avill meet with acceptance at the hands of other 

 workers in the same field, cannot at present be stated ; but it may 

 be confidently asserted that in some particulars serious modification 

 will be imperative. 



Section in Graves's Quarry, near the Village of Milton. 



ft. in. 



1. Suvface-soil and shattered stone 3 



2. Shattered stone, white, fine-grained, and scarcely oolitic in tex- 



ture, containing a few scattered fragments of corals and a 

 NerincBCC 3 



3. Marlj clay of a bluish cclour 2 8 



4. Coral-bed. A light-coloured, fine-grained, hard limestone, not 



oolitic, and almost ringing when struck with a hammer 2 7 



5. Marlj^ clay with a bluish tinge 1 



6. Stone in large blocks 1 



7. Ferruginous marly clay 2 4 



8. Stone in blocks 2 



9. Marly clay with a bluish tinge 1 6 



10. Soft imperfect stone with argillaceous seams, containing Cypri- 



cardia,Natica, Modiola, ?in({ Ostrea 1 10 



11. M.?^v\y ^]i?t\.B v!\i\i Modiola BiW^ Ostrea 8 1 



12. Soft imperfect stone 1 2 



13. Marly shale with Os;^rm 2. 3 



14. Imperfect stone, harder than no. 13 1 9 



15. Marly shale, much filled with comminuted shells of Ostrea 1 10 



16. Imperfect stone 1 4 



17. Marly shale with Ostrea in extreme abundance 3 3 



18. Rubbly stone in about eight layers, without either shale or clay 



between them 4 



19. Marly shale, grey and ferruginous, sometimes indurated, and 



having Os^^rea in extreme abundance 3 3 



20. Dense oolitic limestone of a yellow colour, and ha^-ing oblique 



lamination. It contains comminuted fossils, cliiefly shells, in 

 extreme abundance 11 8 



54 6 

 The following Madreporaria have been taken from bed number 6 

 of the above section : — Cryptocoenia., sp., Montlivaltia caryophyllata, 

 31ontlivaltia, a vspecies having a naked costulated wall, Chorisasircea 

 ohtusa, Adelastroea magnifica ?, Isastrcea limitata, I. gihhosa, Tham- 

 nastrcea Lyelli, Anahacia complanata, Microsolena excelsa. 



Prom the nearness of the above section to the outcrop of the 

 Great Oolite, and consequently to the underlying Inferior Oolite, it 

 is more than probable that it corresponds more closely with the 

 section exposed in the rail way- cutting near Stonesfield than with 

 the one at Caps Lodge near Burford, though the latter is only 

 distant from it about a mile. But there is further and more direct 

 evidence favouring the conclusion that the Caps Lodge and Milton 

 sections, with their respective coral layers, do. not correspond with 

 each other in time. The Milton quarry is undoubtedly the one 

 mentioned by Mr. Hull at page 58 of the Memoir of the Geological 

 [Survey, illustrating sheet number 44 of the map, in these words : — 

 " On Milton field, in a large quarry, a section similar to that at 

 Windrush is exhibited. There we find about 17 feet of inter- 

 stratified marls, shales, and thin-bedded limestones, highly fossili- 

 ferous, resting on thick-bedded oolite more than 12 feet thick, and 



