﻿Vol. 6 1.] 



RUSTIC EOCKS OF MONMOUTHSHIRE. 



383 



(Lis-Werry section, continued.) 



/' 



Shales, black 



Feet 



about 4 



5 b. Limestone, dark-grey, earthy; 'beef 

 on the upper surface. Immedi- 

 ately below these are occasion- 

 ally present hard nodules with 

 Pecten (Chlamys) valoniensis and 

 Pteria contorta adhering to them : 

 very variable deposit 



6. Shales, black 1 



C Limestone, dark : selenite 



Clay, black, indurated and arena- 



7. < ceous in places : about 



^ Limestone, dark 



8. Shales, black about 3 



9. Yellowish-brown earthy limestone, 



with ' beef ' on the top 



10. Shales, black and brown 4 



12. 



13. 

 14. 



f a. 



11. Limestone, earthy, hard in places: 



2 to 4 inches 



Shales, black and brown 1 



Yellow, ferruginous layer 



Shales, black and brown 2 



Sandstone, coarse, weathers into 

 a quartz-sand, deep-red but 

 occasionally yellowish : about 

 Shales, black and brown, with 



gritty layers 1 



Sandstone-beds passing clown 

 into brown and black shales, . 



with thin grit ty layers 



' Tea-Green Marls.' Greenish 



and yellowish marls 13 



Eed Marls, with greenish 

 patches seen 15 



15.«< 



b. 



I 



{.: 



inches. 



f Same fossils as in Bed 4, 

 P I with the addition of 



1 Schizodus Ewalcli and 

 I Pteria contorta. 



3 

 1 



1 Pecten (Chlamys) valo- 



niensis. 



2 Schizodus Ewaldi and 



many shell-fragments. 

 1 Gyrolepis Alberti (scales 



and teeth ?). 

 



Pteria, contorta, Schizo- 

 \ dus Ewaldi, Cardium 



cloacinum. 



3 Gyrolepis Alberti. 



3 



01 



Schizodus Ewaldi. 



4 

 



6 Casts of a lamelli branch. 











Some of the beds in this section are very fossiliferous, especially 

 the shales 4 & 5 a, as is usually the case. Desmacanthus cloacinus 

 was obtained from one of the beds by J. E. Lee. 1 



The Khaetic is poorly exposed in the river-bank, and along the 

 railway at Maes-glas. 



III. Conclusion. 



In the Newport district— except perhaps at Goldcliff — the plane 

 of separation between the ' Tea-Green Marls ' (Keuper) and the 

 black shales of the Ehaetic is very definite. As Mr. Strahan wrote : 



'The plane itself is not infrequently accompanied by an inch or two of 

 conglomerate, consisting of quartz-pebbles, rolled teeth and bone-fragments 



Note-Book of an Amateur Geologist' 1881, p. 35 & pi. xii 



