24S 



NEW RED SANDSTONE. 



The Rhffitic Beds have been exposed near Long Itchington and 

 Stretton-on-Dunsmore, but further north they are much obscured 

 by Drift. Below the White Lias come black shales, sand and 

 sandstone, and green marls. ^ Similar beds are exposed near 

 Pershore in Worcestershire. Rh^etic Beds have been observed 

 in Needwood Forest, west of Burton-on-Trent, and south of 

 Uttoxeter, in Staffordshire;- they have also been identified near 

 Market Drayton in Shropshire, a district much obscured by Drift. 

 South of Audlem Station in Cheshire, black shales and buff marl 

 have been noted, the latter graduating into the Keuper Marls. ^ 



The Rhsetic beds, where they approach the Palaeozoic land 

 of the Bristol Coal Basin, the Mendip Hills or South Wales, 

 frequently overlap the New Red rocks, whether Red Marl or 

 Dolomitic Conglomerate, and repose directly upon the older rocks. 

 They sometimes present conglomeratic characters, as at Nempnet 

 near Chew INIagna, near Frome, and Shepton INIallet. 



To the south of Cardiff the Rhaetic Beds are well displayed in 

 the cliffs from Penarth Head to Lavernock Point. The section at 

 Penarth, which has been measured in detail by ]\Ir. Bristow and 

 Mr. Etheridge, is as follows : * — 



Beds with Ammonites plaiiorbis, Ostrca Liassica, etc. 

 i Grey and pale-brown arenaceous shales, with oc- 

 \ casional beds of hard limestone, but not very 



( fossiliferous. Modiola minima, Aitaiitia, Lima, tic. 



r Band with Pecten Valonicnsis. 



I Black shales with shelly limestones, Avictda contorta, 

 \ Cardium Rhaticiim, etc. 



I Bone-bed with Fish-remains. 

 ^ Shales, etc. 



/ Grey earthy limestone, with Fish-scales and lignite. 

 \ Pale cream-coloured, greenish-grey, white and pale-red 

 } marls. 



(Greenish-grey crumbling, jointed, and conchoidal 

 marls. 

 Keuper. Red marls. 



The Rhcetic Beds have been traced in many parts of Glamorgan- 

 shire, between Cardiff and Pyle, west of Bridgend. At Coed 

 Mwstr, north-east of Bridgend, White Lias, greenish-clay and 

 conglomerate occur ; at Gelligaredig, north-west of that town, the 

 beds comprise brown sands, resting on green and grey marls: and 

 at Pyle, limestones, shales, and marls occur. At the Stormy Down 

 Cement-works, between Pyle and Bridgend, the White Lias was 

 recognized by Mr. Bristow beneath the Lower Lias limestone and 

 conglomerate. 



On the coast, at Sutton, Southerndown, and Dunraven, south of 



1 H. PL Howell, Geol. Warwickshire Coal-field, 1859 ; P. B. Brodie, Q. J. 

 xxi. 160, XXX. 746 ; R. F. Tomes, Q. J. xl. 356. 



2 W. Molyneux, Burton-on-Trent : its History, etc., 1S69, p. 170. 



3 G. Maw, G. Mag. 1870, p. 203. 



^ See Vertical Sections, Sheet 47 (Geol. Survey), and R. Etheridge, Trans. 

 Cardiff Nat. Soc. vol. iii. (1S72). 



