230 NILGHIEI HILLS. 



Mr. Adolphe Schlaglatweit in his " Report on the progress of the 

 Tj k ii M Magnetic Survey" published in the Journal of 

 Schlagintweit. ^.j^g Asiatic Society of Bengal,* has already 



recorded his observations on this subject, and his conclusions, although 

 rendered somewhat obscure by what is probably a typographical error, 

 appear to be very similar to those independently arrived at by the 

 present surveyors. 



There are three principal systems of faulting, two of them probably 

 synchronous, and at right angles to each other, 



Three systems of faults. . .... 



being those which coincide with the lines of the 

 Eastern and Western Ghats respectively, and a third probably subse- 

 quent to the above, and contemporaneous mth the final upheaval of 

 the Neelgherry plateau. 



The first of the systems of dislocation, viz., that to which the forma- 

 tion of the Eastern Ghats is due, has an E. N. E. 

 First System. 



direction, varying occasionally to N. E., and there- 

 fore about coincident with the general strike of the foliation. To 

 this system belong the great faults with a down throw to the South-East 



which have produced the Eastern Ghats and the 

 Eastern Gnats and ^ 



other line of escarpment. South-Eastern escarpment of the Neelgherries, 

 and those with a North Western down throw, which have given rise to the 

 o-reat Kundah escarpment, and that at Neddiwuttam, both of which face 

 - towards the North-West. To the smaller dislocations of this system 

 may be attributed the valley of Pykara at the foot of the " Himagala" 

 rano-e and the great South-Eastern escarpment of the Dodabetta range 

 (See Fig. 7) both on the plateau of the hills, and having a down throw 

 to the South-East. 



The second system is nearly at right angles to the preceding, and 



^ has a W. N. W. direction, varying to N. W., 



Second system. 



where it meets the former system in the Neel- 



* No. II for 1S57, New Series No. LXXXVI. 



