36 HAYDEN : GEOLOGY OF THE PROVINCES OF TSANG AND 0. 
Although, with the meagre data available, any attempt to corre- 
late the Jurassic system of the Phari area with that of Kampadzong 
is perhaps of doubtful utility, yet it is advisable to draw attention 
to the mutual resemblance of parts of the two series : thus crinoid 
limestones occur in both areas and are in each case probably overlain 
by slates and quartzites, which, in one area certainly and in the other 
very probably, are succeeded by fossiliferous limestones overlain by 
shale. If the two series are placed side by side, their mutual resem- 
blance becomes apparent : 
Kampa dzong. Phari. 
Spiti shales . . . . . ? ? 
Shale and quartzite .... Shale and quartzite. 
Lungma limestone .... Upper limestone. 
Slate, quartzite and conglomerate . Slate and quartzite. 
Crinoid limestone .... Crinoid limestone. 
Slaie and quartzite. 
Brachiopod limestone. 
Combination of the two series gives the following sequence: 
Upper and partly r Spiti shales. 
middle Jurassic. X Shale and quartzite. 
inferior Oolite . Lungma limestone. 
r Slate, quartzite and conglomerate. 
! Crinoid limestone. 
I las . • 
Slate and quartzite. 
Brachiopod limestone. 
This, however, is based on such imperfect data that it can be re- 
garded merely as a suggestion for a temporary working hypothesis. 
CHAPTER V. 
THE JURASSIC SYSTEM [continued). 
(e) Between Tuna and Karo La. 
In spite of the great extent of the Jurassic system between the 
Himalaya and Lhasa, very little information beyond that gathered in 
the Kampa dzong and Phari areas was obtained during the rnarch 
( ) 
