LIST OF ILLUSTRATIONS. xi 



PLATE PAGE 



XVI. A Dolerite Sheet at Paalhuis, under the Nieuweveld 



Escarpment 263 



XVII. Aasvogel Kop, near Vosburg, Victoria West - - 266 



Fig. 20. Showing the Undulations of the Glen Grey 



Dolerite Sheet - .... 267 



Fig. 21. Section from Imvani to Buffeldoorns, through 



the Glen Grey Dolerite Sheet - - - 268 



Fig. 22. Map of Kentani, showing the Distribution of 



the Dolerite Sheets and " Gap " Dykes 270 



XVIII. The Falls of the Tsitsa River in East Griqualand - - 272 



XIX. Dyke of Granophyre, traversing a Thick Sheet of Dolerite 



near Mouth of Kobonqaba River, Kentani - - 277 



XX. Columnar Structure in Dwyka Tillite produced by the 



Overlying Sheet of Dolerite - 284 



XXI. Surface Formed by a Dolerite Sheet in the Fraserburg 

 Division, near the Road from Fraserburg to Willis- 

 ton - 286 



Fig. 23. Plant, Zamites recta, from the Uitenhage 



Series (Wood Beds) - -297 



Fig. 24. Plant, Onychiopsis mantelli, from the Uiten- 

 hage Series (Wood Beds) - - 298 



Fig. 25. Plant, Cladophlebis browniana, from the Uiten- 

 hage Series (Wood Beds) - - - 299 



Fig. 26. Fossils from the Uitenhage Series (Sunday's 



River Beds) 300 



XXII. Cretaceous Limestones on the Pondoland Coast - - 329 



Fig. 27. Fossils from the Umzamba Beds - - - 333 

 Fig. 28. Ammonite, Mortoniceras soutoni, from the 



Umzamba Beds 334 



XXIII. High-level Gravels lying unconformably upon Inclined 

 Beds of Uitenhage Age (Enon type), Paarde Kloof, 

 near Tover Water Poort, Uniondale .... 375 



