﻿408 ME. L. RICHAEDSON ON THE EH2ETIC AND [Aug. 1 0,0 5, 



Sandstone, from which Bhsetic fossils have been obtained, has 

 been worked near the Angeltown As}dum, and (more recently) for 

 building the church at Pen-y-fai. 



The section in the railway-cutting at Cwrt-Colman is now for the 

 most part overgrown, but the details recorded by Tawney show 

 (1) that there is an increase in the proportion of the shale-deposit 

 to the sandstone as compared with the Quarella section, and (2) the 

 presence of a recognizable bone-bed (Quart. Journ. Geol. Soc. 

 vol. xxii, 1866, p. 70). Massive sandstone-beds, however, are 

 still to be seen on the south side of the line. Near this cutting, 

 in a road-section south of Melin Cwcw, certain information 

 concerning the upper portion of the Rhsetic has been obtained 

 by Mr. Tiddeman. 1 



(C) Stormy Down. 

 The picturesque and breezy moorland known as Stormy Down 

 is covered with large masses of Bhsetic sandstone, and is broken with 

 many scattered openings, most of which have been made in search 

 of sand for silica-bricks. In a long line of excavations the following 

 sequence may be observed : — 



Thickness in feet inches. 



a. Sandstone with an uneven base: 10 to 12 feet seen 11 



b. Marl, green and yellow, clayey. Soft and bard layers alter- 



nate. They appear to have been slightly contorted previous 

 to the deposition of the superincumbent sandstone, as soft 

 arenaceous matter fills up the miniature synclines. A little 

 lignite occurs near the base about 1 10 



c. Marl, greyish-green ; full of plant-remains , . 1 



d. Clay, brown "2 



<>. Marl, grey and brown seen (> 



[Apparently this deposit extends some feet deeper.] 

 f. Sandstone of considerable thickness [' Tea-Green Marls' ?]. 



Tawney (op. cit. pp. 70, 71) has recorded Pteria (Avicula) eontorta 

 from the mads intervening between the sandstone-deposits on 

 Stormy Down ; while from the sandstone (bnt not in situ) I have 

 obtained casts of Schizodus, MyopJwria, Natica jpylensis, Tawney, 

 and Cylindrites oviformis, Moore, together with a fragment of the 

 ichthyodorulite of a Hybodus. 2 By the roadside near Llangewdd 

 Court large masses of sandstone were found to contain numerous 

 plant-remains. 



(D) Stormy-Down Cement-Works. 



At the time of my visit to the Stormy-Down Cement-Works 

 water had accumulated in the pit, and so it was only possible to 

 examine certain of the Lower Liassic beds. The lower beds are, 

 therefore, tabulated on Mr. H. B. Woodward's authority. 



1 ' The Geology of the South-Wales Coalfield ; Pt. vi— The Geology of the 

 Country around Bridgend ' Mem. Geol. Surv. 1904, p. 53. 



2 See also ' Summary of Progress of the Geological Survev for 1899 ' (1900) 

 p. 131 ; ' The Geology of the South-Wales Coalfield; Pt. vi '"Mem. Geol. Surv. 

 1904, p. 56 ; and Quart. Journ. Geol. Soc. vol. xxii (1866) p. 71. 



