No. 694. 



Vol. LIX of Whole Series. 



Price 2s. 6d. 



The 



Geol 



ogicai lYiagazme 



HDouthlv) 3ournal of ^coloov 



WITH WHICH IS INCORPOHiXKD 



THE GEOLOGIST. 



FOUXDKD IN 1854, BY THE LATE DR. HENRY WOODWARD, F.K.S. 



Editor 



R. H. RASTALL, Sc.D., M.Inst.M.M. 



ASSISTED BT 



Prof. J. W. GREGORY. D.Sc. F.R.S. Sir JETHRO J. H. TEALL, Sc.D., F.R. 



F. H. HATCH, Ph.D., M.Inst.M.M. Prof. W. W. WATTS. Sc.D., F.R.S. 



Prof. J. K. MARR, Sc.D., F.R.S. HENRY WOODS, M.A., F.R.S. 



A. SMITH WOODWARD. LL.D.. F.R.S. 



APRIL, 1922. 



CONTENTS :— 



Page 

 Editorial Notes 145 



Original Articles. 



The Geology of Ascension and St. 

 Helena Islands. Bv Professor 

 R. A. Daly .". 146 



On the Overlap of the Upper Gault 

 and on the Red Chalk. By Dr. 

 F. L. KiTCHiN and J. Pringle 156 



The Northward and Eastward Ex- 

 tension of the Karroo Lavas. 

 By F. P. Mennell 166 



On Lower Lias Ammonites from 

 Skye. ByDr. L. F. Spath 170 



Reviews. Page 



The Crinoidea Flexibilia 177 



The Geology of Johannesburg 178 



Oil Shales 179 



The Nepheline Rocks of Sekukuni- 



land 180 



Engineering Geology 181 



Reports and Proceedings. 



Mineralogical Society 182 



Edinburgh Geological Society 183 



Liverpool Geological Society 187 



Yorkshire Geological Society 188 



Coj 



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