90 
HAYDEN 
GEOLOGY OF SPITI. 
that stage and to the ladinic, thus constituting a passage-bed from the 
one to the other. More detailed work among the upper triassic rocks 
will also, in all probability, reveal similar gradations between the other 
stages. It would therefore seem unreasonable (o attempt to draw ima- 
ginary lines which should represent hard-and-fast boundaries between 
any two stages; we can merely indicate certain beds of the Himalayan 
sequence which include the representatives of the smaller European 
subdivisions. The complete sequence of the mesozoic beds of Spiti 
will be found in the annexed table, in which, however, no attempt has 
been made to fix the limits of the corresponding stages of Europe. 
( 90 ) 
