PKEFACE TO THIS EDITION. 



THE first edition of this book was written as one 

 of a series designed by Dr. Muir, Superintendent 

 of Education, to further the study of Natural 

 Science in South Africa. During the five years 

 which have passed since it was prepared con- 

 siderable advances in our knowledge of Cape 

 Geology have been made, and in this second 

 edition the work has been revised and largely 

 re-written in the light of the new information. 



The chief additions are in those parts of the 

 work dealing with the ancient rocks of the north 

 of the Colony, the Karroo system, and the rocks 

 of the volcanic pipes related to the Kimberley 

 group, while there are great advances in the 

 palaeontology of the Bokkeveld, Karroo and 

 Cretaceous formations. 



In order to keep the size of the book within 

 moderate limits the less important parts of the 

 first edition have been reduced or omitted. 



