IGNEOUS ROCKS OF TASMANIA. ~ 305 
acteristics of an independent rock. On the same grounds, 
greisen, too, might be logically ignored. The appearance 
of Limurite in Tasmania, as well as in the Pyrenees, favours 
the inference that it will recur wherever the necessary con- 
ditions prevail. Where emanations from cooling granite act 
upon calcareous strata, there axinite rock may be expected. 
There seems no reason why it should not bear the name 
first given to it by Frossard, after Count Limur. 
In concluding this review of the eruptive rocks of Tas 
mania, I may mention that I have omicted allusion to many 
occurrences which are known from hand-specimens, but 
which have not been examined in the field. 
From a scientific point of view the rocks which are the 
most interesting are those which possess unusual associations, 
such as the melilite basalt at Sandy Bay, the diorite at 
Port Cygnet in a plexus of eleolitic rocks, the trachydolerite 
at Table Cape associated with normal olivine basalt, the 
hypersthene basalt at Stanley. All of these require careful 
working out on the spot. The nephelinite and melilite 
basalt at Shannon Tier are also in a part of the Island where 
normal olivine basalt occurs. The recent discoveries show 
that the basalts of the Island are far more varied than has 
been anticipaced, and the relations of their magmas to each 
other demand rigid study. 
