PREVIOUS ACCOUNTS. 
5 
Chapter I. 
PREVIOUS ACCOUNTS OF THE GEOLOGY OF SPITI. 
Although Spiti had been visited by geologists at various times 
during the past century, no detailed systematic survey had been 
made, and in 1898 it was decided that a more careful study the 
whole area should be undertaken. For this purpose the present 
writer was deputed to Spiti in the summer of that year; the work 
was continued by him, accompanied by the late Dr. von Krafft, in 
1899, t'^^ present writer again during the summer of IQOI. 
The work carried out during the above three seasons, while 
claiming no pretensions to detail, has, however, been brought upas 
far as possible to an uniform degree of completeness, sufficient, it is 
hoped, should occasion ever arise, to facilitate an intimate study of 
horizons and sections. 
Of the various papers relating to Spiti and neighbouring areas 
the following are of chief importance : — 
StolicZKA {F.). — Geological sections across the Himalayan Moun- 
tains. 
(Memoirs, G. S. I., vol. V (1866), art. i, pp. 
I— «54-) 
StOLICZKA {-F.). — Summary of geological observations during a visit 
to the provinces — Rupshu, Karnig, South 
Ladikh, Suroo and Dris — of Western Tibet, 
1865. 
(Memoirs, G. S. I., vol. V (1866), p. 337.) 
Mallet {F. R.). — On the Gypsum of Lower Spiti. 
(Memoirs, G. S. I., vol. V (1866), art. ii, pp. 
'53—172) 
McMahon (G£A^. C. /i.).— Notes of a tour through Hangrang and 
Spiti. 
(Records, G. S. I., vol. XII, pp. 57 — 60.) 
( 5 )' 
