82 Reviews — -Jukes-Browne 8f Hill — Gault and U. Greensand. 



the cliief hill ranges, rivers, and lakes. In succeeding chapters 

 the author gives a full account of the strata, entering into many 

 particulars concerning the eruptive rocks, and recording detailed 

 sections of the coal-bearing strata in the Carboniferous Limestone 

 series and Coal-measures. In this great series the highest division 

 is the " Upper or Barren Red Sandstone Group," composed of red, 

 purple, grey, yellow, white, and variegated sandstones, shales, clays, 

 and marls, with some thin limestones and poor coals. Many fossils 

 have been obtained in this group by Mr. J. W. Kirkby, including 

 fishes (Diplodus, Megalichthys, etc.), Crustacea (Bellinurus, Eurypterus, 

 Prestwichin, etc.), as well as molluscs such as Antliracomya and the 

 annelide Spirorbis pusillus, Full lists of them and of fossils from 

 the other formations are given by Mr. Peach in the Appendix ; 

 special mention being made of the long and enthusiastic labours of 

 Mr. Kirkby. 



Sir A. Geikie remarks that " The topogi-aphy of the whole region 

 has been profoundly modified by the geological events of the Ice 

 Age. So tliick was the mass of ice which then descended from the 

 Highlands, that it passed over the lofty ridge of the Ochils and the 

 other hills to the south, and turned eastwards into what is now 

 the Firth of Forth and the North Sea." Of the glacial deposits, 

 and also of Recent deposits and the latest changes, many interesting 

 descriptions are given ; and there is a final chapter on the Economic 

 Minerals. Some detailed notes on the petrography of the Igneous 

 rocks are contributed by Mr. Herbert Kynaston, in an appendix. 



II. — Memoirs of the Geological Survey of the United Kingdom. 

 The Cretaceous Rocks of Britain. Vol. I. The Gault and 

 Upper Greensand of England. By A. J. Jukes-Browne, B.A., 

 F.G.S. ; with contributions by William Hill, F.G.S. Royal 

 8vo ; pp. xiv, 499, with 85 figures and 5 plates. (London : 

 Wyman & Sons, 1900. Price 9s.) 



IN the preface Sir Archibald Geikie, the Director-General of the 

 Geological Survey, states that the present volume is the first 

 of two in which the Upper Cretaceous Rocks of England will be 

 described by Mr. Jukes -Browne, who has been collecting the 

 materials for the subject since 1884. Owing, however, to his 

 unfortunate ill-health, he has been unable to complete the necessary 

 field-work, but this obstacle has been overcome by the assistance of 

 his friend and coadjutor Mr. William Hill, who has examined the 

 outcrops of the formations in the South and East of England, and 

 in addition has carried out a series of important researches on 

 the mineral and organic constituents of the deposits by means of 

 microscopic sections and the examination of I'esidues after treatment 

 with acid. 



The strata described in this volume have, since early da3S, attracted 

 the attention of many of our British geologists, amongst whom may 

 be reckoned William Smith, Thomas Webster, William Phillips, 

 Dr. Mantell, Dr. Fitton, Sir R. Murchison, and R. A. C. Godwin- 

 Austen. At a more recent period, Mr. C. J. A. Meyer, Mr. F. G. H. 



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