BUNDELCUND. ] 3 



It is important then to specify the amount of this contortion. It is 



often very sharp, but never seems to carry the 

 Amount of. 



beds much out of an average horizon : anticlinals 



and synclinals are always near each other. The consideration of the 



upper groups does not assist the interpretation. 



The Tirhowan limestone is best seen in the neighbourhood of the town 



of same name on the Punwaree hills to the S. E. 

 Tirhowan limestone . 



which look like the face of the table-land. The 



300 feet at base are of this limestone, bedding most regular, averao-e thick- 

 ness of beds 18 inches, perfectly horizontal; when isolated and well 

 developed as here, it is always free from impurities ; its character is in- 

 variable throughout, fine and compact like Solenhofen stone but with a 

 saccharine instead of an earthy lustre ; when struck it smells like flint ; 

 and rings under the hammer like quartzite. 



It varies little in colour — a light cream colour or a light pinkish 

 grey : the strata weather on surface into grooved lines, having a pre- 

 vailing N". W. direction ; these are produced by thin paperlike seams 

 of crystallized carbonate, decomposing more readily than the stone itself. 

 The top of the hill is composed of Kymore sandstone also quite hori- 

 zontal : between the two is a massive bed, about 40 feet thick, of a 

 siliceous breccia. This rock is almost always found on the limestone ; 

 on Pulkoa hill it is as well marked as here ; it varies but little, " here 



it has its most irregular texture ; there is no sandy 

 Tirhowan breccia. . 



matrix, a sintery or even a hyaline bond seems the 



commonest, with the agate, jasper, and chert fragments in complete 



disorder. There is no appearance of broken-up stratification as at 



Bugruhu hill ; there are, however, pieces of agate, now shivered and 



separated, which evidently once formed a continuous block in their 



present position; small irregular veins and angular interstitial drusy 



cavities are common throughout the breccia; the silex lining them shews 



the ordinary structure, layers of calcedony frequently covered by a 



