. TRIASSIC SYSTEM/ 83 
From 30 to 50 feet higher up the shales contain large numbers of 
Spiriferina f^riesbachi 3.nA Aulacothyris joharensis. Avery good 
section is seen in the valley of the Lungtse stream (PI. V) which joins 
the Spiti river between M^ni and the Pin valley. The same beds are 
also seen about 4 miles west of Po, on the road to Dankhar, where they 
have been brought down by a fault, and again near Sopona E, G,, 
on the path leading to the Manirang Pass. This is no doubt the 
outcrop from which specimens of Spiriferina grtesbachi were collected 
by Mr. Griesbach.^ The only ammonite which has been obtained 
from these beds is Distichites n. sp., of which only fragments were 
found. 
In spite of the a[)parent absence of Sagenites, this horizon was 
provisionally correlated with Diener's " Sagenites beds " of Painkhanda ; 
this correlation was subsequently found by Dr. von Krafftto be correct, 
for, at the Bambanag cliff in Painkhanda, the " Sagenites beds'"' are 
overlain by a quartzite series identical, both lithologically and faunisti- 
cally, with that which occurs immediately above the Monotis shales in 
Spiti, 
The quartzite series forms one of the most constant and charac- 
Upper triassic teristic horizons of the upper trias of Spiti, and 
quartzite series. consists of white and brown quartzites, with sub- 
ordinate bands of limestone. In most sections the quartzite can be seen 
at a distance of several miles, forming a thin, white band, which stands 
out among the darker brown and grey beds in the high cliffs of the 
upper trias. With the quartzites are intercalated limestones and 
bands of shale, the whole series having a thickness of about 300 feet. 
Fossils occur in most of the beds, and include — 
Spiriferina grieshachi, Bittrer. 
Aulacotliyris johm ensis, Bittner. 
> Pal. liidica, ser. XV, vol. Ill, pt. 2, p. 53. 
StoWczV&'s" Spiriferina tibetica," ■^\\\c\\ he obtained from near Kibber and 
which he supposed to be of carboniferous age, almost certainly came fron^' tbe same 
horizon which is exposed on the path from Kibber to the Parang La— Stcliczka's 
original route. No carboniferous b^ds are found within many miles of Kibber, 
ibid., p. 53. 
G 3 83 ) 
