93 IVYNNE : GEOLOGY OF KTJTCH. [PAUT I. 



In many places good level flags of fine and coarser grain occur 

 likewise in this group. 



The upper beds of the lower Jurassic, or the lower ones of the 



upper group being often thin-bedded sandstones 



Intermediate beds. . , , , ii p • i i -u- 



alternating with shales would lurnish building 



stones occasionally of fair quality. 



The sandstones of the upper Jurassic group are, as a rule, too coarse 

 and friable to afford good stone for building pur- 

 poses, though several of the more ferruginous varie- 

 ties have been largely used as well as some of a yellow or whitish colour. 



Among the traps there are several solil basaltic varieties which 

 from their resistance to the wasting effect of 



Traps. 



the atmosphere would stand well in buildings, 

 but their hardness seems to prevent their use. There is no reason why 

 building materials of the same character as those of the rest of the 

 Deccan trap should not be found among them, to which the remarks 

 of Mr. Blanford* would apply with equal force, their natural state of 

 weathering being the best guide to their selection. 



The harder marly beds of the tertiary rocks are frequently used for 

 carving, in ornamental and other buildings; al- 



Tertiary. 



though they are easily worked and look well, they 

 deteriorate quickly, flaking off where exposed to the weather, as may be 

 seen in the neighbourhood of Vinjan. More highly calcareous varieties 

 of course last better, and among these much stone of fail" quality might 

 be obtained. 



Beds of calcareous quartz grit, thick yellow sandstone or conglomer- 

 ate and concrete, belonging to the upper tertiary 



Upper tertiary. 



rocks are quarried for buildings in the neighbourhood 

 of Toona, in the Kanta generally, and other tertiary parts of the district ; 



* Memoirs, Geol. Surv., India, Vol. VI, page 217. 



( 92 ) 



