LOWER TRANSITION ROCKS. 



95 



alternate with laminae of haematite, varying from a soft, rather argil- 

 laceous, red ore through micaceous ore to massive glittering speculat- 

 ion. In richness of iron the beds vary from very poor, nearly pure 

 quartzites, to very rich, in which latter case the ferruginous laminae 

 outnumber the siliceous ones eight or ten times. None of the ores 

 have, so far as I know, been as yet analysed, so their percentage of 

 phosphorus is as yet undetermined, and it therefore remains to be 

 seen whether, if smelted on a large scale by Thomas and Gilchrist's 

 Basic process, they would yield a slag so rich in phosphorus 

 as to be a valuable artificial manure, and thus to command a good 

 market by which the mere by-product would go far to pay the prime 

 cost of the smelting. 



No section gives so good a sequence of the several formations 



The Narihalla sec- making up the Sandur hill series as the section 



tlon * along the Narihalla from the western boundary 



near the village of Somulapur to a little beyond the village of Ettina- 



hatti, which is quoted below : — 



18. Hoshalli contemporaneous trap. 



w. 



r 



17. Schist. 



Haematite 



zite schist 

 Haematite 



quart- 



17- 



E. 



Devadara \ 

 hill beds. J »' 



16. Haematite quartz- 



quart- 



16. 



„ Bhim Tirth bed. 



( 



ite and schist. 



zite. 











15. Schist. 



Schist. 





15- 



n 



Sandur flow. 



14. Trap, contemp. 



Haematite 

 zite. 



quart- 



14. 



,, The gorge bed. 



»» 



13. Clay schist. 



Schist with 

 temp, tra 



con- 



P- 



13- 



u 



ii 



12. Trap, contemp. 



Haematite 

 zite. 



quart- 



12. 



11 



>> 



11. Haematite quart- 

 zite. 



Schist. 





11. 



11 



ii 



10. Trap, contemp. 



Haematite 

 zite. 



quart- 



10. 



i> 



The gorge beds. 



9. Haematite quart- 

 zite. 



Schist. 





9- 







8. Ferreous argillites, 



Haematite 



quart- 



8. 







red, brown, and 



zite. 











chocolate. 













7. Haematite rock. 



Schist with con- 

 temp. trap. 



7- 







6. Schist. 



Haematite 

 zite. 



quart- 



6. 



Long cliff bed. 



95 ) 



