143 ] 



YI. 



THE AXTRi:\I RAISED BEACH : A CON'TRIBUTION TO THE 

 ^s'EOLITHIC HISTORY OF THE JS'ORTH OF IRELAND. 



By GEORGE COFFEY and R. LLOYD PRAEGER. 



[Plates IY.-IX.] 



Eead June 13. Ordered for Publication June 15. Published December 16, 1904. 



CONTENTS. 



PAGE 



Introductory Note. (R. LI. P.), ,, .. .. ,. .. ., 144 



Geology. (R. LI. P.) :— 



Descriptive Geology of the District, . . . . . . . . . . 145 



Erosion Phenomena, .. .. .. .. .. ..146 



Deposition Phenomena, . . . . . . . . . . . . 147 



The liaised Beach Deposits, .. .. .. .. .. 147 



The Estuarine Clay Series, 148 



Geological History of the District, . . . . . . . . . . 150 



Late Glacial History, 150 



Post-Glacial History, .. .. .. .. .. .. 152 



Graphic Representation of Changes of Level, . . . . . . 153 



Correlation with English and Scottish Land Movements, . . . . 157 



Limits of the Area affected by the Fluctuations, . . . . . . 163 



Further Notes on the Larne Raised Beach, . , . . . . . . 166 



Archeology. (G. C.) : — 



The Larne Flints, 172 



The Field Club Report, 172 



Personal Investigations, . . . . . . . . . . . . 174 



Patination and Abrasion, .. .. .. .. .. ..176 



Form of the Flakes, 180 



Larne not a Dwelling-Site, . . . . . . . . . . 182 



The Larne Celt, 182 



The Kitchen-midden Axe, .. .. ,. .. .. .. 187 



The Chisel Type, . . 188 



The Sand-hill Sites, 190 



Occurrence of " Larne " Types, .. .. .. .. .. 191 



Correlation of Changes of Level with Human Periods. (G. C. and 

 R. LI. P.) :— 



Evidence from Larne, . . . . . . . , . . . . 193 



Evidence from Whit epark Bay, .. .. .. .. 194 



Evidence from Portstewart, . . . . . . . . . . . . 195- 



Conclusion, . . . . . . . . . . . . . . . . 198 



R.I.A. PROC, vol. XXV., SEC. c] [14] 



