﻿Vol. 6 1.] CONTIGUOUS DEPOSITS OF GLAMORGANSHIRE. 419 



are seen at the bottom of the quarry noticed above (p. 418). 

 Unfortunately, this well, which is situated in the orchard at the back 

 of the inn in the village of Codrington, had been sunk some weeks 

 previous to my visit to this part of the country, and the greater mass 

 of the rock which had been excavated had been carted away. 



The well is 70 feet deep, aud the water-supply good. Those 

 blocks of Lower Lias which were sufficiently compact had been 

 used for walling the sides of the well, so that very little of the rock 

 was lying about. The limestone which could be examined con- 

 tained small specimens of Lima gigantea and Ostrea liassica. How 

 great a thickness of Lower Lias was penetrated could not be ascer- 

 tained. Pieces of a compact cream-coloured limestone showed that 

 the White-Lias Sun-Bed had been proved, together with the sub- 

 jacent, rubbly, fossiliferous White Lias, which contained Plicatula 

 hettangiensis (one specimen), Lima valoniensis, Protocardium 

 Philippianum, Modiola minima, Moore, and gasteropoda. Masses 

 of a hard limestone (with a mammillated surface and faint arbor- 

 escent markings) showed that the Cotham Marble was present, if 

 not in its quite typical form. The remaining Upper Rhsetic 

 deposits are apparently similar to those which were exposed in the 

 railway-cutting at Lilliput, and some of the indurated portions con- 

 tained fish-scales and teeth not uncommonly. Black shales were 

 very much in evidence, and contained a hard dark limestone with 

 Pecten (Chlamys) valoniensis, Pteria ( Avicula) contorta, Placunopsis 

 alpina (large), and /Schizodus (?) : also dark, calcareous, very mica- 

 ceous, and occasionally pyritic sandstone-layers. A number of 

 pieces of Bone-Bed were found. They indicated that the Bone- 

 Bed here was not of the same lithic structure as that at Lilliput, 

 doubtless owing to the fact that it does not rest upon any member 

 of the Carboniferons System or the Old lied Sandstone. This is 

 known from arenaceous ' Tea-Green Marl ' having been found 

 among the debris. The Bone-Bed is a dark-grey, micaceous, 

 sandy limestone, with Gyrolepis Alberti (scales and teeth ?), Acrodus 

 minimus, and coprolites of fishes ; but it passes into a thin pyritic 

 sandstone containing a few vertebrate-remains. The excavation 

 was terminated in the Carboniferous Limestone. 



Just 2 miles in a direction a little east of south of Blue Lodge the 

 White Lias is quarried near Barton Farm, Upton Cheney, the 

 following section being exposed : — ■ 



Thickness in feet inches. 

 fClay 



I Limestone, rubbly 3 /r > , „ 7 . 



p, 'j ( Ostrea Liassica, 



T . J"' V j'" n ".',' '■.'" | Pleuromya crow- 



! Limestone : four beds, with clay ' comhda J Tate 



between the middle two 7j M ' „ , 



I Moore, Protocar- 



OSTREA 



Beds. 



Clay . 4 



Limestone : five beds, with clay- 

 partings 1 



I, Clay 4 



Wiiitk JB. Sun-Bed, capping hard cream- 



Lias. \ coloured limestones 4 



[White-Lias rubbly beds.] 

 [Gotham Marble.] 



