48 



[part I. 



Chapter V. — Rock formations. 

 The rock formations of Kutch have been sub-divided thus : — 



lOEMATIOlfS. 



SlTB-DITISIOirS. 



Peeiods. 



Eecent 



f AUuYium, blown sand and sub-recent de- 

 t posits (m-n). 



1 Pleistocene. 





f Upper Tertiary 



. r (1) 



Probably botb pleiocene and meiocene.- 





(Vneoirformity.) 







Tebtiaky 



Ai-gillaeeous Group (Possiliferous) . 

 Arenaceous Group 



E(k) 

 D (j) 



Meiocene or Upper Eocene. 





Nummulitic Group 



C (i) 







.Gj-pseous shales 



B (h) 







CSub-Nummulitic 



A (g) 



>-Eoceiae. 



VOLCASIC Tertiaey 



^ Stratified Traps (e) and associated 

 intertrappean beds 



(f) 







Llnfra-Trappean Grits 



(d) 







( Unconformiii/J 







Jbeassio 



f Upper Jurassic Group 



( Lower Juj'assic Group (Dogger) .. 



(c) 



(b) 



tooUtic. 



Metamoephio 

 Ceystalliwk 



Syenite 



(a) 





Teappean 



Intrusive Traps. 





Syenite. 

 Taking these groups in the order of their antiquity, a basement 

 for the whole, though at a distance, occurs in the crystalline rocks of 

 Nuggur Parkur. Here the bold hills of Kalinjur are entirely composed 

 of coarse red syenite or syenitic granite, having 

 sometimes a foliated appearance on the weathered 

 surfaces ; — traversed by elvan and dioritic dykes and veins. As is the case 

 in other places, it frequently exhibits large spheroidal forms. No 

 schistose rocks were observed in its neighbourhood ; but as these occur in 

 ( 4.8 ) 



Kalinjur hills. 



