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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 29, 



Beche and Brodie ; but, as I have had the pleasure of examining this 

 section lately in company with my friends Messrs. J. Jones and Lucy, 

 of Gloucester, whose observations entirely agree with my own, I feel 

 more confidence in the accuracy of the details here given, after their 

 having been tested by three different observers. 



Section of the Avicula contorta heels at Garden Cliff near Westbnry- 



on-Severn. 



(The beds are described in descending order.) 



No. Lithology. ft. in. 



1. The Ostrea-bed; a. hard, dark- 



grey, argillaceous Lias lime- 

 stone ; many shells on the sur- 

 face 4 



2. Greyish clay from 1 ft. to 2 



3. The Monotis-bed ; a cream-co- 



loured, argillaceous, fissile 

 limestone from 4 in . to 8 



4. Greyish shaly clay... from 1 ft. to 2 



5. The Estheria-bed ; a light-grey 



nodular limestone, in parts 

 shelly; forming a prominent 

 band in the cliff 1 



6. Dark friable shale ; containing 



many fossiliferous seams : 8 ft. 



to 10 



7. Dark shaly clay; containing 



many compressed shells 1 



8. Dark shale ; containing many 



seams of compressed shells ... 4 



9. The Pecten-bed ; a dark argil- 



laceous limestone 2 



10. Black shales 6 



Organic Remains. 



Ostrea liassica, Strickl., Modiola mi- 

 nima, Sow., Cardium,, n. sp. 



(This bed is one of the lowest of the 

 Ammonites flanorbis series.) 



The Monotis-bed contains Monotis 

 decussata, Goldf., in great profu- 

 sion in the upper laminae ; and in 

 the lower, Myacites musculoides, 

 Schl.(?), Cardium Ehmticum, Mer., 

 Modiola minima, Sow., Monotis 

 decussata, and Ostrea liassica. 



The Estheria-bed contains in some 

 part nests of Estheria minuta, 

 Bronn. In the shelly portions I 

 have found Pectcn Vcdoniensis, 

 Defr. 



Many small compressed Conchifera, 

 which have not been determined. 



Pidlastra. 



Pecten Valoniensis, Defr., numerous 

 and compressed. 



Fossils rare : bodies resembling Co- 

 prolites. 



Bones of Saurians and Fishes, teeth 

 of Reptiles, teeth of Fishes, as 

 Saurichthys, Acrodus, Hybodus, 

 and Ceratodus, with many Copro- 

 lites. 



11. The Bone-bed ; a thin band of 



greyish calcareo-siliceous rock ; 

 containing osseous debris and 

 much pyrites. A true bone- 

 breccia 



12. Black shales 2 



13. Dark-grey micaceous sandstone; 



ripple-marked on the upper 

 surface ; forming a prominent 

 bed in the cliff; large slabs lie 

 on the shore 9 in. to 1 



14. Black shale 2 



15. A band of grit resembling No. 



13; containing scales and teeth 

 and much pyrites 



16. Hard black shale 2 



Grey marls of the Keuper. 



The beds are all conformable, and dip to the S.E. at angles varying 

 from 2° to 4°. The Ken per Marls are well exposed in the Cliff, with 



Avicula contorta, Port!., Cardium 

 Ehmticum, Mer., Pidlastra areni- 

 cola, Strickl., and Modiola minuta, 

 ' Goldf. 



Bones, scales, and teeth of Fishes, 

 Pullastra arenicola. 



Bodies resembling Coprolites. 



