258 SANDSTONES OF ENGLAND AND WALES. Sandstones of Formations newer than the Trias. With the exception of the sandstones belonging to the Lower Oolite formations of Yorkshire, the Wealden, and the Kentish Rag of the Lower Green sand formations, there are no sandstones of any importance overlying the Trias in England; and even these just named are only local and compara tively unimportant. (f ) The Yorkshire Jurassic Sandstones, containing bands of coal and jet, are considered by Professor Phillips as the littoral representatives of the marine limestones of the centre and south of England. 1 They are finely displayed in the sea-cliffs of Gris- thorpe, Scarborough, and along Stainton Dale, and Haiburn Wylie; interstratified with shales, iron stones, coal, and ferruginous or calcareous bands. The stone has been largely worked at Aislaby, near Whitby, where it is of a light brown colour, mode rately fine grain, and can be extracted in large blocks. 2 It has been used in Whitby Abbey, New University Library, Cambridge, and Scarborough and Bridlington Piers. Tunbridge Wells Sandstone. This rock is included in the lower division of the great Wealden group, lying at the base of the Cretaceous system, and con sisting of the following members :— 3 1 Manual of Geol. p. 297. 2 Keport of Commis. Table A. 3 Mr. Drew, Mem. Geol. Survey (1833).