256 



WYNNE: GEOLOGY OF KUTCH. 



[PAUT n. 



Wag-ka-puddnr. 



The laterite varies considerably both in colour and texture, and the 

 bed next above it is a thin calcareous band formed almost entirely of 

 various corals confusedly mixed together. 



The ground north-east of Wag-ka-puddur presents over a large 

 space a complicated structure and peculiar aspect 

 characterised by Colonel Grant as " recently blown 

 ouf at one locality, where much contortion and the effects of intense 

 disintegration are only to be traced. 



The relations are simply these. The rocks being sharply contorted, 

 subsequent denudation has disclosed many small exposures of the traps 

 surrounded by the variegated deposits of the lateritic group, and left 

 only a few outlying patches of the succeeding nummulitic marls resting 

 upon a strong bed of laterite directly superimposed upon the traps. 



The following succession will illustrate the arrangement of the 



rocks : — 



Descending order. 



-10. — Light yellow, compact, and rubbly calcareons and marly beds, 

 Ntimmulitic, I. s nearly horizontal, and forming the basal escarpment of the 



^ nummulitic group. AlveoUna and Nummulites abundant. 



9. — Soft brown shales veined with yellow ochre. 

 8. — Ferruginous, nodular band, Flacuna, Anomia elyros. Gray, 

 and Ostrea Flemingii, abundant, fish vertebrse, and portion 

 of a reptilian jaw bone. 

 7. — Blue and yeUow gypseous shales, in the lower part some 

 concretionary hsematitic layers, and one bed of brecciated 

 ash. 

 f" 6. — Decomposed, gray, thinly laminated shales, rusty brown 

 above, with ferruginous laminse, in which a few leaves 

 occur. J 



These shales are in places black, carbonaceous, and pyritous, and 

 much resemble the alum shales of Mhurr. They contain 

 small lumps of mineral resins and bitumen, also little horny 

 scales, which may either be crustacean or fish remains. 

 Some of their lower friable beds are composed of impalpable 

 dust of a pale buff colour (perhaps volcanic), between the films 

 '^ of which are numerous impressions of leaves. 



{ 256 ) 



GypSEOTTS SHAXIS, 



H. 



StrB-mraiMUiiiTic, 

 D. 



