462 Annals of the South African Museum. 



Valley, at Lusnna and Lusambo along 5 Lat., and also in the east 

 in Kasai. 



Lualaba Beds. The Lualaba Beds have been described by Cornet 

 as (-(insisting of clays, grits, sandstones, limestones with little coher- 

 ence and often oolitic, etc., and have been shown to cover a large 

 area in the Congo Basin. 



Studt in 191o gave the following as an ideal complete section of 

 the Lualaba Beds: 



12. Mottled clavs X- imidstones black, white and red 1 00 ft. 



, 



11. Coarse red micaceous X: felspathic gritty, pebbly sand- 

 stones 110 ft. 



10. Greyish calcareous shales X: thin aragonite bands . . 10 ft. 



( .l. Black shales with pyritic coals, X: coarse felspathic grits 140 ft. 



8. Light grey calcareous false-bedded & banded sandy shales SO ft. 



7. Pyritic black shales and gritty sandstones 10 ft. 



('). Light grey calcareous banded X: fluted sandy shales . 60 ft. 

 5. Red pebbly sandstones, grits & conglomerates with 



intercalated beds of brown shale 160 ft. 



4. Light pink to grey sandstones X- shales 80 ft. 



:>. Pyritic black shales X- coals with intervening felspathic 



grits 120 ft. 



2. Light red to yellow medium-grained sandstones & shales 20 ft. 



1. Grey calcareous breccia 80 ft. 



Studt's bed no. 12 is not the carbonaceous shale mentioned by 

 I'assan, and it is possible that his beds 10, 11 and 12 may belong 

 to the Lubilache series. 



Passau in a paper on the beds in the area north of the Kasai 

 along the Ulindi and Elila subdivides the succession as follows: - 



/ 5. Banded arenaceous shales with indeterminate 

 Lubilache plants. 



' 4. Clayey banded shales with nodules and pebbles. 

 }. Black clay shales - - graphitic, carbonaceous and 



micaceous with plant fragments. 

 2. Clayey shales with pebbles. 



1. Soft greenish clayey sandstones passing into 

 conglomerate with very large inclusions gener- 

 ally of subjacent rocks. 



He states that the Lualaba has a more restricted occurrence than 



the Lubilache, on account of the overlap of the latter on the former. 



Hitherto, the Lualaba Beds have yielded only a few fossils - fish 



Lualaba 



