158 KING: KADAPAH AND KARNUL FORMATIONS. [PART 111. 
'The varying amount of cleavage in differently constituted but 
adjacent bands of rock is often very well displayed.— First, locally, as 
in the case of a series of limestone and talcose strata: near Moota- 
koola* beds of this kind occur. The planes of cleavage have an undu- 
latory course which is clearer and more tortuous in their passage 
through the talcose bands, as in the annexed diagram (Fig. 19). 
e. Taleose slate 
b. Limestone 
Fig. 19. Cleavage varies in amount in rocks of ditferent composition. 
In the next two figures, the same feature is illustrated over a 
good extent of country. Fig. 20a is a diagrammatic section across part of 
the Nullamullays at the northern end of Jundermorum tank, where 
clay-slates (c) rest on calcareous slates (b) and these again on silicious 
limestone (a). The slates are highly cleaved, with planes dipping 30° 
E. by N., while the calcareous slates are cleaved to a much less extent ; 
the limestone at the bottom of all being entirely devoid of this structure. 
The next illustration (Fig. 207) shows variation in the inclination of 
the cleavage planes: it is also from the Nullamullays, this section being 
taken in a nearly westerly direction from Jungamaraypilly to the 
valley which runs southwards to Yellacoopa. 
* In the north-east part of the country, 16 miles west-north-west of Vinnaconda. 
(088! 2) 
