268 



THE GLEN GREY SHEET 



plateaux ; for example, between Indwe and Lady Frere, 



around Gala, and 

 north of Engcobo. 

 In Queenstown and 

 Glen Grey a thick 

 3 * g s g .3 sheet of dolerite un- 

 dulates in a most 

 uncommon manner, 

 and forms, owing to 

 irregular denuda- 

 tion, domes and 

 basins often of no 

 small diameter. In 

 the east and north 

 the regularity of the 

 intrusion is broken 

 by numerous off- 

 shoots from the 

 main mass, while to- 

 wards the west the 

 sheet is now discon- 

 tinuous owing to ex- 

 tensive denudation. 

 In Fig. 20 the ramifi- 

 cations of this sheet 

 are indicated, the 

 arrows showing the 

 directions of dip of 

 the intrusions ; a 

 section through the 

 same area is given 



