Yol. 68.'] THE AEDEN SANDSTONE GEOtTP OP WAEWICESHIEE. 271 



The point must not be ignored that the flexuring of the 

 sandstone may, to some extent, have been caused by the removal of 

 beds of rock-salt by solution from the underlying Marls. The 

 contouring indicates that if such beds once existed, and if water 

 gained access to them, there would be a flow of the brine to the 

 south-east and south : as the basins are not ' locked up,' but are 

 tilted in the directions mentioned. Beds of rock-salt of great 

 thickness occur at Droitwich and Stoke Prior, a few miles to the 

 west of the area here described, and it would be interesting to 

 ascertain by means of the zoning of the marls how the salt basin is 

 tectonically disposed. The fact that the water obtained in a deep 

 boring through the Lias at Eugby into the Lower Keuper Sandstone 

 was unfit for drinking purposes, owing to impregnation by salt 

 and gypsum,^ shows that salt-deposits must once have existed, and 

 perhaps still exist, to the east of the district here described. That 

 they once existed in Central and South Warwickshire also is, 

 therefore, not unlikely. 



From the foregoing remarks it may be inferred that an investi- 

 gation of the folding of the Arden Sandstone Group in this and 

 other areas may throw useful light on questions of theoretical 

 and economic importance, especially on those relating to water- 

 supply and the movement of underground water. Perhaps also, 

 later on, such an investigation may throw light on the possibility 

 of reaching coal at a workable depth, as the Lower Keuper in 

 this district probably lies on rocks not younger than the Permian. 



IX. Deep Boeings theotjgh the Ketjpee Maels. 



Deep borings have, from time to time, been made through the 

 Warwickshire Marls into the underlying rocks, and a few of the 

 sections have been published — for example, by W. Jerome Harrison, 

 Dr. A. Strahan, and Dr. Horace T. Brown.^ As it is important that 

 fuller information should be accessible as to the sequence and 

 thickness of the Marls and the nature of the underlying rocks, 

 the three following additional borings are here recorded, although 

 they are outside the limits of my map. 



(i) Artesian Well at Alveston Hill. 



This boring, which is situated about a mile and a half east of 

 Stratford-on-Avon and a mile and a quarter from the nearest 

 Rhsetic and Liassic outcrop, was completed in 1898 to supply the 

 villages of Alveston and Tiddington. The following details were 

 supplied to me some years ago by the courtesy of the engineers, 

 Messrs. Willcox & Eaikes, of Temple Pow, Birmingham, to whom 

 I tender my best thanks. For 200 feet an 11-inch tube (10-inch 

 internal diameter) was put down, then an 8|-inch tube (8-inch 



1 Geol. Mag. dec. 3, vol. iii (1886) p. 454. 



2 W. J. Harrison, ibid. p. 453 ; A. Strahan, ibid. pp. 540-45 ; and H. T. 

 Brown, ibid. dec. 4, toI. iii (1896) pp. 54-58. 



