﻿380 



MR. LINSDALL RICHARDSON ON THE 



[May 1905, 



(C) 



5b 



Llanmartin. 

 1 ? Shales, black. Feet 



3. Limestone,with layer of ' beef ' on 

 the under surface, very earthy. 



4. Shales, black 



5. Yellow earthy deposit 



6. Shales, black 



7. Yellow earthy layer 



3 Pteria contorta. 



8. 



1 



r 



15-! b. 



Vie 



r 



0i 



7 



2* 



4 



2 

 6 

 0* 



Pectens (Chlamys), 

 much crushed ; fish- 

 scales. 



Schizodus (?). 



Shales, black 



9. Limestone, earthy, passing into an 

 indurated marl about 



10. Shale, black 1 



11. Sandstone, micaceous, weathering 

 into a rich yellow sand 



12 to 14. Shales, black ; estimated at 3 

 Quartz - sand. Immediately 

 above are two thin layers of 

 yellow clay, with a |-inch seam 

 of quartz-sand interpolated ... 

 Greenish clay, with sandstone- 

 layer at the base 



c. Coarse sand 1 q 



d. Greenish clay J 



e. Grit, coarse, weathering into a 

 quartz-sand 



a. Clay, greenish 



b. Thin seam of quartz-sand 



c. Greenish-grey and black clay ... 

 Tea-Green Marls.' 



a. Pale greenish-grey and yel- 

 lowish marls 1 2 



a J h. Band of marlstone, weather- 



1-1 -j ing somewhat nodular 8 



§ I c. Pale greenish-grey and yellow 



£ I marls about 12 2 



P \J1. Red Marls. 



Near Milton there are two exposures, one of which may be 

 distinguished as the Llanwern section, in order to prevent 

 confusion. It is situated three-quarters of a mile north -by-east 

 of Llanwern railway-station, and shows the junction of the Rhaetic 

 and the Keuper : the beds at this horizon resembling those exposed 

 at Bishton, rather than the beds exposed at Llanmartin, 



(D) Llanwern. 



Feet inches. 



14. Shales, black, with a few gritty 

 layers near the base. 



15. Quartz-sand, rich reddish- brown 

 at the top, and dark-chocolate 

 below 



16. Grit, extremely-hard masses in 

 places ; in others, thinner and 

 laminated 





8 Acrodus minimus. 



I h f I. ' Tea-Green Marls ' about 13 



Wood ; scales of Gyro- 

 lepis. 



P (2 I II. Red Marls 



