448 Journal of the Asiatic Society of Bengal. [N.S., XIV, 1918.] 
has escaped corrosion, it is reasonable to suppose that at least 
as much of their original floor must also have been preserved. 
So far as we are able to form an opinion from the present 
state of the enquiry, the areas of Fundamental Gneiss traversed 
by the epidiorite dykes might represent therefore a portion of 
the floor of the Dharwars. They would represent, in every 
reasonable sense, a portion of the original crust of the globe. 
CoNCLUSION. 
The actual conditions that promote the form of metamor- 
phism that has produced the Charnockites must, for the present, 
suggest that the re-crystallisation has largely taken place 
without complete fusion. 
e are only on the threshhold of the study of these 
interesting rocks. Yet it has been thought that the a 
cation of the above suggestions regarding their ee 
relationship to the Dharwars may fulfil a useful poral 
| This refers specially to those regions where, as is usually the rule ip 
Peninsular India, the post-Dharwar raeks have not been much affectee 
oe ee EN ee eS eee 
