Sec. 2.] detailed descriptions. 85 



On the Nerbudda, a range of hills formed of quartzite rises from the 



^ , ., , .,, alluvial plain about 2 miles west of Hindia. This 



Quartzite mils near ^ 



Hi°^^^' range stretches along the river for some distance to 



the westward. Similar qviartzite occurs^ as abeady mentioned, at 



Nimawur, north of the river, opposite Hindia. (a) 



About Hurda syenitic and granitic rocks occur. Much alluvial 



,^ , , . cotton soil covers the surface, but it is often very 



Metamorpnics near _ •' 



Hui-da. thin. Thus, in one place, a few miles west of the 



town, on the road to Kundwa, although no rock whatever was visible 



on the sm-face, blocks of granite for the railway works were being quarried 



from a depth of only 6 or 8 feet. 



In the Machuk river trap is found about Dunwara. In the upper 



„ , , . ,^ , , part of this stream no rock is met with as a rule. 

 Section m Machuk ^ 



^'^^^^- although trap is exposed near Mohunpoor and 



Gahal. About half a mile below Dunwara coarsely crystallized peg- 

 matite, (or rather protogene,) containing a chlorite-like mineral, is met 

 with, and forms the bed of the stream for a considerable distance. At 

 Devapoor there is metamorphic limestone. The rocks are extensively 

 metamorphosed and no foliation can be recognised. 



In the country between the Machuk and the Tawa, large outliers 



of traps overhe the metamorphic rocks. The same 

 tween the Macliuk and is the case north of the Machuk, but to a smaller 



extent. No attempt has been made to ascertain 

 precisely the boundaries of these numerous little patches : the larger areas 

 have been roughly surveyed, so as to indicate the general mode of occm*- 

 rence. Most of the patches are oval or oblong, their larger axis correspond- 

 ing with the general strike of the metamorphic rocks, or about east 20°-30°- 

 north, and it is evident that they are due to the traps having overflowed the 

 irregular surface of the underlying formations, in which, as at the present 

 day, ridges of the harder beds, chiefly quartzite or compact granitoid gneiss^ 



(a). This quartzite has been shewn by Mr. Mallet to belong to the Bijawui-s. 



( 247 ) 



