THE CRETACEOUS SYSTEM 291 



Kraal on the Sunday's River, the marine Sunday's 

 River beds may be underlain by the Wood beds and 

 those again by the Enon, but there is evidence that 

 even in the Uitenhage area rocks like the Enon beds 

 were formed during the deposition of some of the Sun- 

 day's River beds. On the hill west of the native loca- 

 tion at Uitenhage there is a small thickness of grey 

 shale and limestone, containing marine fossils, inter- 

 bedded with red sands and gravels belonging to the 

 Enon type, although to the east of Uitenhage these 

 marine strata are not found interbedded with con- 

 glomerates or sands of the Enon type. The sands 

 and pebble beds west of the native location at Uiten- 

 hage lie against a rather steeply inclined slope of sand- 

 stone and quartzite belonging to the Table Mountain 

 series, evidently the shore during a certain stage of 

 the deposition of these rocks. The sands and conglo- 

 merates are the deposits formed near the shore, or in 

 most cases probably in steep-sided inlets, drowned valleys 

 in fact, which bordered the sea in which the Sunday's 

 River beds were laid down. The marine beds inter- 

 calated with the red beds near the location represent a 

 period of extension or encroachment of the sea on the 

 land-locked inlet in which the red beds were formed. 



In the Uitenhage district, then, we find that the Enon 

 beds cannot be regarded as merely the earlier deposits 

 of the Uitenhage period. As far as our knowledge goes, 

 they certainly were the earliest of these deposits, but 

 their formation continued during the laying down of the 

 marine clays and limestones of the Sunday's River beds 



along the shores of the sea in which the latter were 



19* 



