Chapter VII. 



containing the work done by the Itahan exj^edition in difterent 

 branches of natural science.* 



Like Stuhhnann and Scott Elliot, he absolutely excludes 

 all possibility of a volcanic origin for the chain. There is 



SENECIO AND IIKI.K'UKYSUM IX THE UPPER BUTAGU VALLEY. 



only one circumscribed point of the whole region explored, 

 namely, the rock wall which forms the shelter of Kichuchu, 

 where a formation of a volcanic nature exists, consisting of 

 veins of basalt enclosed in a wall of gneiss. 



The inclination of strata is often very marked, reaching at 

 times an angle of over 60°, and is, as a rule, turned eastward 



*Appenclix D contains a short résumi' ì)y Dr. Koccati of the geology of the 

 range. 



222 



