254 KAKKOO KOCKS IN THE MAl-UXGABUSI. 



Escaipnieiit grits (coinpare Beacon Hill, ■'<e<].), and enierg-es 

 on to flats of slaicliy cla^' shales and coaly sJiale beds, witli 

 many exposed noduiai masses of red ironstone of sejitarian 

 form. These masses are a great featnre of the Matal)ola l)eds 

 in the Gorodema basin. 



Escarpnrent g'rits, such as the a])ove, foini a ten ace or 

 minor tableland around Masosoni in fiont of the foot of basalt- 

 capped clilfs, and imdude pebble beds and coarse red sandstone, 

 the latter of which sometimes weathers in reniform and 

 mamillary shapes throug'h the cementing- together of sand 

 grains on the oxidation of iron. Through this minor tableland 

 the Bume has trenched down to the underl^'ing- beds of clays 

 and coal seams, so that a conformable succession is apparent. 

 On the south slo])e of IJeacon Hill some deYelo])ment of the 

 seams was carried out in 1011, but the quality of the coal was 

 not considered satisfactory. Immediately under the grit are 

 some IKJ feet of clays, weatheiing- with starcdiy fracture, some- 

 times carrying' thin beds of g'ypsum and being- underlain by the 

 coal-shale, coal and clay series of l'{0 feet, unl)ottomed. 



From Masosoni there is a i)ath going- south to Sikonyauhi. 

 After leaving- the Bume KiA-er one rises over marly clays 

 containing- silicihed wood to a considerable thickness of the 

 Escapment grits series. The hig-hest bed is a loosely c-oherent 

 felspathic g-rit, weathering- in red iron-cemented ag'g-reg-ates of 

 sand, with a few ang-ular jiebbles of a size \ip to half an inch. 

 The contact with the overlying- Forest sandstone is conform- 

 able — the bed immediately superposed being- a wliitisji very 

 fine sandstone covered 1)3' a red sandstone. The latter is 

 considerablj' veined in the reticulate form described at Tuli 

 and (iwampa (1) and at Pasipas (5). 



The basalt cai)X)ing- is (jver 125 feet in thickness (tlie toj) 

 not being' seen), the jjath running- in a depression l^etween 

 hig-her hills of it. The probability that it lies in two sheets 

 was arrived at by finding- amidst the talus slopes lumps of 

 red indurated sandstone with adhering- fragments of scoriaceous 

 basalt resembling- the interbedded sandstone found in the 

 Xyamandhlovu series on Chelmer farm, near Pasipas (5). 

 Displaced boulders of basalt rock of vesicular character were 

 found on the talus slopes. 



Another route into the (iorodema basin is from Imjjali on 

 the ITmniati across the flats to l\vndo]izaia villa g-e. The path 

 then g-oes between the two Hat-topped outliers of Kadonia and 

 Muma, and descends past deej) nullahs cut into soft beds of 

 a g-rey sandstone, which is made u]) f)f quartz and fels])atln(- 

 interstitial matter and Hinty seg-reg-atjons of red ^hade (1324) 

 that strew the surface, all of which are ty])ical of beds of 

 Forest sandstone. There is also an intercalated bed of unsorted 

 g-rit of quartz and quartzite g-rains up to the size of ])eas, 

 with fragments of ang-ular felspar. Continuing- the descent 

 to Gorodema, although no ])oint of contact was noticed, my 



