﻿Vol. 6 I.] CONTIGUOUS DEPOSITS OF GLAMORGANSHIRE. 



417 



At Wainlode Cliff, on the banks of the Severn between Gloucester 

 and Tewkesbury, no White Lias is present : the Paper-Shales rest 

 directly upon the Pseudomonotis-~Bed, as shown in the 

 section : — 



following 



Thickness in feet 

 Osthea-Bkds. Limestone, hard, blue 



Paper-Shales, brown and grey, finely 

 laminated, with an intermittent 

 limestone-band 1 



(1. Limestone. Pseudomonotis-Bed. 'In- 

 sect-Limestone.' Hard, dark-grey 

 and blue 



Shales, blue and brown, laminated, 

 weathering into a marly clay 5 



&{ 



| I 3. Limestone. Estheria-Bed. ' Cypris'- 

 £ I Bed. Hard, yellow, nodular ; arbor- 

 -^ I escent markings ; irregular fracture.,. 



| 4. Shales, pale, greenish-yellow, coarsely 



^ laminated, marly 6 



Lower 



Biletic. 



Pteria (Avicula) -contorta Zone. 



inches. 



4 Ostrea liassica, Modi- 



ola minima. 

 (Pseudomonotis fal- 

 [ lax, l Darwinulalias- 

 3 { sica, I), liassica var. 

 | major {teste Brodie 

 ^ & Prof. T.B.Jones). 

 ( Modiola minima, 



5 { Ostrea (teste Brodie); 



^ insects ; fish-scale. 

 ( Lycopodites lanceo- 

 2 latus ; Estheria mi- 

 I nuta var. Brodieana; 

 { ostracoda {teste 



Brodie) ; fish - re- 



6 I mains and shell- 

 ^ debris. 

 (Modiola minima, 



■{ Schizodus Ewaldi, 

 { Cardium cloacinum. 



Near Chase Hill, Wickwar, the thin flaggy limestones of the 

 Ostrea-Beds rest directly upon the Cotham Marble, 2 and in that 

 neighbourhood the bed frequently contains Pseudomonotis fallax in 

 abundance. But to the south, in the railway-cutting at Lilliput, 

 near Chipping Sodbury, the sequence is as follows ; — 



Thickness in feet 

 Ostrea-Bev,s. Thin flaggy limestones, separated 



by thin shales 3 



White Lias. B. Compact cream - coloured 



limestone 1 



a s 



1. Cotham Marble 



/'Grey shale, containing plant-beds 



at 15 and 18 inches from the top. 2 



~ Brown, unfossiliferous shale 1 



« i 



Lower 

 Biletic. 



j Argillaceous limestone 



' Brown or grey shale, with lenti- 

 cular beds and concretions of 

 argillaceous limestone at two or 

 three levels 5 



Pteria (Avicula) -contort a Zone. 



inches. 



{Ostrea liassica, Mo- 

 diola minima, and 

 Pleuromya. 



o : 



5 



3 Darw in ula&c Estheria . 







6 



Fragmentary shells, 

 [ Cardium cloacinum, 

 { Modiola. 



In the foregoing section, the position of the White Lias is clearly 

 shown: it occurs above the Cotham Marble. 



Some 5 miles south-south-west of Lilliput the White Lias is seen 

 to have increased in thickness ; for, in a quarry by the side of the 



1 Pseudomonotis deenssata of my previous papers. 



2 Geol. Mag. 1804, p. 534. 



Q. J. G. S. No. 243. 2 h 



