Renews — Memoirs of the Geological Survey. 87 



clay, Purple and Hessle Clays, with associated gravels. The large 

 transported masses of Lincolnshire Limestone and Marlstone, to 

 which attention was first directed by Prof. Morris, are described ; 

 and Mr. Jukes-Browne regards them as due, together with the 

 Boulder-clay itself, to the agency of coast-ice. 



Among the mineral resources of the district, the Lincolnshire 

 Limestone is noteworthy, being largely quarried at Ancaster. Of 

 the iron-ores, that derived from the Marlstone Bock-bed is most 

 important, and it has been lately described by Mr. E. Wilson 

 (" Midland Naturalist," vol. viii. 1885). The gypsum in the New 

 Bed Marls at Newark is also extensively worked. 



4. The Geology of Eskdale, Bosedale, etc. By C. Fox- 

 Strangways, F.G.S., C. Beid, F.G.S., and G. Barrow, F.G.S. 

 8vo. pp. 65. (London, 1885.) Price Is. 6d. 



THIS is an Explanation of Quarter-sheet 96 N.E. of the Geological 

 Survey Map. It contains an account of the Lias, the Oolites 

 from the Dogger to the Middle Calcareous Grit, and of the Glacial 

 and Post-Glacial beds. 



The Upper beds of the Middle Lias, which constitute the Iron- 

 stone series, are described in detail. They furnish the well-known 

 Cleveland Ironstone. The Dogger, which occurs at the base of the 

 Oolites, is a variable bed changing from limestone to sandstone, and 

 in places yielding the valuable iron-ore of Bosedale. 



In the Lower Estuarine Series, above the Dogger, comes the 

 Eller Beck Bed, yielding marine fossils, which was described by 

 Mr. Barrow in the Geological Magazine (Decade II. Vol. IV. 

 p. 552). Higher up there is a bed of coal which has been worked. 

 The Grey Limestone Series, and the Upper Estuarine Series, the 

 Cornbrash, Kellaways Bock, Oxford Clay, and Corallian Bocks, 

 present many features of interest, and their palasontological contents 

 are duly noted. The Whinstone or Cleveland Dyke is an intrusive 

 dyke of augite-andesite. 



The absence of Drift over most of the country now described is 

 remarkable. Boulder-clay extends to a height of about 800 feet in 

 the valleys to the north of the table-land, but is not met with in the 

 interior, nor has any trace been found there of local glaciation. 

 Hence it is concluded that the uplands formed an insular space 

 round which the ice-sheets swept, while these high grounds were 

 not glaciated. 



5. — The Geology of the Coasts adjoining Bhyl, Abergele and 

 Colwyn. By Aubrey Strahan, M.A., F.G.S. (with Notes by B. 

 H. Tiddeman, M.A., F.G.S.) 8vo. pp. 73. (London.) Price Is. 6cZ. 



THE area here described is included in Quarter-sheet 79 N.W. of 

 the Geological Survey Map, and was originally surveyed by 

 Messrs. W. T. Aveline, W. W. Smyth, and A. C. Ramsay. The 

 ground having been re-surveyed on the scale of six inches to a mile, 

 by Messrs. Tiddeman and Strahan, the map has been revised, and 

 this Explanation published. 



