56. 
HAYDEN: GEOLOGY OF^SPITI. 
Salt Range 
Spiti 
Trias 
Scythian (Buntsandstein) 
Upper 
Upper ceratite 
limestone 
Zone of Stephanites sw 
perbus 
Not yet recog- 
nised. 
Ceratite sand- 
stone 
„ B'lem incites 
jlemingianus 
" HedenstrsE- 
mia beds " 
Middle 
Ceratite marl 
„ Koninckites 
iioltitus 
Prtonolobus 
rotundatus. 
Zone of M eskocB- 
ras lilangense. 
Lower 
Lower ceratite 
limestone 
„ Celtites sp. 
Permian 
Thuringian (Zechstein) 
Upper 
Chideru 
group, or 
upper 
Productus 
limestone 
Zone of Euphemtis indicus 
„ Medlicottia 
ixynnei 
Zone of Opliiceras 
tibeticum 
„ Bellerophon im- 
ptessus 
Zone of Otoceras 
woodwtzydt 
Cyclolobus old- 
hntni 
,, Derbyia hemi- 
sphcBrica 
„ Productus linea- 
tus 
Dark shales with 
Cyclolobus old- 
hami 
Middle 
Virgal group, 
or middle 
Productus 
limestone 
,, Xenodisciis car- 
bonartus 
Dark shales with 
Xenodiscus 
carbnnarius 
„ Lyttonia nobtlis 
., FusuUna kntta- 
ensis 
Calcareous sand- 
stone with 
Spi'i'ifev tnti set- 
kheylensis 
Lower 
Amb group, 
or lower 
Productus 
limestone 
„ Spirifer marcoui. 
Conglomerate and 
sandstones 
It will be noticed that the calcareous sandstone of Spiti* has been 
correlated with the lower zones of the middle Productus limestone ; 
the fossils obtained from this bed in Spiti are, however, hardly suffi- 
( 56 ) 
