340 THE EMBOTYI BEDS 



is washed by the sea ; the streams from the country 

 behind the cliff fall over it, hence its name. The 

 westward prolongation of the line of cliffs coincides 

 with the foot of the escarpment on which the Egossa 

 Forest stands. 



The finer grained portions of the beds, which appear 

 on the shore near the mouth of the Umgwegwane 

 River, are green shales and sandstones containing 

 fragments of blackened wood, the only organic remains 

 hitherto found in the group. Further search in these 

 rocks is likely to be rewarded by the discovery of plant 

 remains that cannot fail to be of great interest, and it is 

 to be hoped that the search will be made before long. 



The conglomerates towards the south-west end of the 

 outcrops are pebbly rocks with water-worn fragments 

 of dark grits and mudstones, certainly derived from the 

 underlying Karroo beds. North-east of the Umgweg- 

 wane Eiver the conglomerate becomes extremely coarse, 

 and bedding planes are often difficult to find. Near the 

 conical green hill on the Waterfall Bluff side of the 

 river, and between that hill and the Bluff, immense 

 blocks of coarse and fine-grained dolerites are found 

 interbedded in a matrix of smaller boulders of similar 

 material arid of dark grits, mudstones and shales like 

 those in the conglomerate farther south-west. Some 

 of the dolerite blocks measure twenty feet in length. 

 This conglomerate is the most tumultuous-looking rock 

 in the Colony ; magnificent exposures of it can be seen 

 on the seaward face of the green hill, and near Water- 

 fall Bluff. The irregular spaces between the boulders 

 are sometimes filled with radiating bunches of brown 



