156 WYNNE : GEOLOGY OF KUTCH. [PART II. 



This concrete, sometimes a coarse conglomerate, formed of large 

 blocks of the local rock with a calcareous matrix, occurs also at the foot 

 of the chain in the low ground between Kota and Koonrea. It varies 

 here in colour from gray to rusty yellow and black, and in some places 

 appears to give an unusually flat surface to the ground. 



The beds which flank the chain along here on its northern side 

 U b d f th" ^^^ strong, coarse, yellow sandstones and flags, 



country. generally dipping at high angles to the north, 



but sometimes bent into curves, the axes of which slope to the west. 



Further out in the narrow plain or ' Kanta,' which skirts the 

 hills, are greenish shales and pale purple sandstones containing Ammonites, 

 Belemnites, Oysters, and other bivalves, while above them are black 

 sandstones and red shales. The beds on the northern side of the chain 

 must have a large thickness, a northerly dip of 30° has been seen 

 along a line crossing them for more than half a mUe, which did not 

 traverse all the rocks of the section, so that it will not be too much to 

 estimate them at over 1,000 feet. 



South of Koonrea, the anticlinal becomes low and open, the 



rocks undulating over the country in wide 

 Koonrea. , . ,. . 



sweeping curves, with gentle inclination to the 



westward; some massive beds of coarse, orange, white, and red 

 sandstone with ferruginous layers forming abrupt hills of as much 

 as 80 feet. In this country also, bands of soft gray and rusty 

 shale, often 20 feet thick, occur, while in the river Kara at Rodur and 

 to the north, they form vertical clifi's from 60 to 80 feet in height, undu- 

 lating over the country with low dips in different directions. Among 

 them are strong beds of soft sandstone light in colour and of coarse 

 texture, with some bluish, gray, highly silicious compact layers. 



These beds bend round the western end of the anticlinal, so as to 

 overlie the purplish sandstones which cap Wadha hill, and form its 



( 156 ) 



