ON PHOTOGRAPHS OF GEOLOGICAL INTEREST. 



217 



Marine undercutting. 1902. 



Basalt overlying Chalk. ,, 



Fault between Chalk and Basalt. ,, 

 Basalt overlying Chalk. „ 



Amj'gdaloidal Basalt. ,, 



Amvgdaloidal Basalt with vertical amyg- 



duTes. 1902. 

 Tongue of Upper Lava piercing Lower 



vesicular Lava. 1902. 

 Basalt Dyke in Trias. 1902. 



Keuper. 1902. 

 Boulder-clay on Keuper. „ 



>> •> •• 



Laminated Boulder-clay. „ 

 Deceptive appearance of horizontality in 



Trias. 1902. 

 Junction of Basalt and Chalk. 1902. 

 Basalt Dyke in Chalk. „ 



DOAVN, — Photographed by Mrs. CoomArasw.\my, Walclen, Worplesdon. 



auildford. 1/4. 



3707 (27) Castles of Kivvitar, Mourne Granite, weathering. 1902. 



Mountains. 



3708 (26) Castles of Kivvitar, Mourne „ „ ,. 



Mountains. 



3709 (25) Slieve Commedagh, Mourne „ „ „ 



Mountains. 



Photographed hy Professor S. H. Reynolds, M.A., F.G.S., University 



College, Bristol 1/4. 



. Basalt Dyke in Trias. 1902. 



. Basalt Dyke in Trias. Cracks filled with 



Calcite. 1902. 

 . Sills breaking across bedding. 1902. 

 . Basalt Sills in Trias. „ 



. Basalt Dyke and Sills in Trias. „ 

 . liasalt Dyke cutting Trias and Basalt Sills. 

 190-'. 



Dublin. — Photographed hy W. B. Wright, 14 Hume Street, Dublin, 



1/4. 



3717 (I) Greenhills . 



3718 (2) 



3719 (3) 



3720 (4) 



3721 (5) 

 372§ (f.) 



Even and Current-bedded sand in Esker. 



1902. 



Ripple-bedding in E.sker. 1902. 

 Silts in Esker ; crumpled band and amid 



evenly bedded silt and sand. 1902. 

 Boulder in current-bedded sand in Esker. 



1902. 

 Sand and silt layers truncated by coarse 



gravel in Esker. 1902. 

 Sand and silt layers in Esker. 1902. 



