^90 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



may therefore, though we have no direct evidence on this point, 

 be as young as that formation. I have already referred to this 

 quarry in the Society's Journal, vol. xvii. p. 497; and it has 

 also been given by Professor Jones in his Monograph on " Possil 

 Estheria," p. 73, in the Palseontographical Society's Monographs 

 for 18G2. The limestone has been worked to a depth of about 

 15 feet, and has a dip of 35° N. W., which is much increased in 

 sections adjoining. The surface of the limestone is quite horizontal, 

 and has a capping of Ehsetic blue clay, 4 inches thick, noticed for 

 the first time in this district, containing numerous Avicula contorta, 

 Ostrea intusstriata, Chiton, Pollicipes Uhceticus, and reptilian and fish- 

 remains of true Ehsetic age. The conglomerate noticed in the last 

 section has been continued in this direction, but has increased to 

 2 feet thick ; and mixed up with its rounded sihceous pebbles 

 occasional fish-teeth and scales are found. Another bed of blue 

 clay, 4 inches, with but few organisms, succeeds, and then another 

 bed of conglomerate, 4 inches. This conglomerate is less dense 

 than the former, and contains fewer pebbles. In the cream-coloured 

 matrix which encloses them, the little crustacean Estheria minuta 

 is occasionally foimd. Above succeeds a grey clay with thin lime- 

 stone bands and nodules, within the laminae of which are little nests 

 containing ioa.SiTij Esther ice, associated with plants and wings of Cara- 

 hidce. Above this is stratified Inferior Oolite, 12 feet, with conglo- 

 merate at its base. Corals of Carboniferous-limestone age are found, 

 not only in the Hhaetic conglomerate but in the Inferior Oolite, in 

 close proximity to the Ehynchonella spinosa. 



Several small openings immediately following, in which are two or 

 three Liassic dykes, lead to the last section I shall give, close to 

 Hapsford, in which • is found a considerable change in the Ehsetic 

 deposits. 



Section at Hapsford Mills. ^^ j^^ 



1. Carboniferous Limestone with horizontal surface, but very 



highly inclined 



2. Ebsetic conglomerate, resting immediately on the above 4 



3. Blue clay parting 2 



4. Stratified conglomerate 10 



5. Clay 2 



6. Conglomerate 9 



7. Clay 2^ 



8. Bed of conglomerate 1 



9. Ditto. 6 



10. Blue marl with flattened pebbles 9 



11. Irregular conglomerates surrounded by blue pebbly marls 3 



12. Series of tliinly laminated grey marls without any trace of 



organisms 3 



13. Irregular masses of conglomerate 2 



14. Stone in lower corner, lithologically like " White Lias," but 



without any trace of organic remains, about , 2 



In this section organic remains of Ehsetic age are abundant. Some 

 blocks of the conglomerate contain many examples of Avicida con- 

 torta and Ostrea intusstriata, with Cardinia, and also a laxge Biscina 

 — probably D. Townshendi ; but it is unfortunately generally crushed. 



