645. 



Decade VI.— Vol. V.— No. III. 



Price 2s. net. 



THE 



GEOLOGICAL MiGAZlNI^ 



ijttcinthln Journal of (ieologn, 



I'lTU WHICH IS IN'CdHL'DLlA'l'Kl) 



Ti^IE <3-EOLO<3-TST_ 



HENRY 



F,niTJ';D iJY 

 WOODWARD. LL.D.. F.R.S. 



F.G.S. 



■&.C. 



ASSISTKD HV 



PliOFKSSOli .J. W. GREGORY, D.Sr., F.P>.H., F.G.S. 

 Dr. GEORGK J. HINDK. F R.S., F.G.S. 

 Silt 'I'HOMAS K. HOLLAND. K.C.I E., A.R.C.S., D.Sc, F.R.S, ViCE-PiiE.S. G.S. 

 Dr. JOHN EDWARD ;\rARR, ?,T.A.. Sc.D. (Camb.), F.R.S., F.G.S. 

 Sir .JETHRO J. H. TEALL, !M.A., Sc.D. (Caub.). LL.D., F.R.S., F.G.S. 

 Pkofksbor \y. W. WATTS, Sc.D. (Camb.), M.Sc, F.R.S., F.G.S. 

 Dr. ARTHUR SMITH WOODWARD. F.R.S., F.L.S., Vick-Pres. Geoi,. Soc. 



MARCH, 1918. 



OOTsTTEin^TS 



]. Oi!iGiNAi> AiiTiCLES. Page 



New oi- imperfectly known Chalk 

 I'olvzoii. Bv E. U. Bkydone, 

 F.G.S. (Plate VI.) 97 



The liias of South Lincolnshire. 

 Bv A. E. Teueman, M.Sc, 

 F'.G.S. (With three Text-tigures.) 

 {Concluded.) 101 



Mountain Building. ]3t 1!. M. 

 Deeley, M. Inst.C.E..'V.P.G.S. Ill 



Datum-lines in the English Keuper. 

 Bv K. L. Sheei.ock, D.Sc, 

 a'.B.C.Sc, F.G.S. (With a 

 Section.) 120 



ANoteon Isostasy. Bv A Mop.eky 

 Davies, A.R.C.Sc. D.Sc. 

 F.G.S., Imperial College of 

 Science ami Technology 12-") 



II. Notices of Memoirs. 

 A Hyaena-den in Ireland. Eeport 



by"li. P. Schartf and others 1 27 



Fossil Man in South Africa. By 



Dr. Broom and others 12s 



Factsrevealed by Antarctic Kesearch 



liearing upon I'roblems of the Ice 



Notices of Memoirs (conf.). Page 



Age. ByMarsden Manson, C.E., 



I'h.D 129 



•lohn Michell and Martin Simpson. 1.^1 



III. Reviews. 

 British Resources of Sands used 



for Glass, etc. Bv Professor 



P. G. H. Boswell .." 1.31 



Phosphates of Saldanha Bay. By 



A. L. du Toit \ \ 18H 



Building and Ornamental Stones 



of Canada. By W. A. Parks ... 1H;J 

 Geology of the Transkei, South 



Africa. By A. L. du Toit 18.1 



Low-temperature P'ormation of 



Alkaline Felspar in Ij'mestone. 



By R. A. Daly 13.") 



IV. Reports and Proceedings. 

 Geological Society of London — 



.lanuary 9, 1918 136 



•January 23 137 



February 6 138 



February 20 1-12 



Edinburgh Geological Society 143 



Geologists' Association 144 



LONDON; DULAU & CO., Ltd., 37 SOHO SQUARE, W. 1. 



The Volume for 1917 of the GEOLOGICAL MAGAZINE is ready, 

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