Classification of Massive. Rocks. 217 
(b 1) olivine minette is an augite minette containing 
olivine. 
2. VOGESITES contain hornblende or augite as the most important 
colored constituent. 
(A) hornblende vogesite. In this, hornblende predominates 
over augite, 
(B) augite vogesite possesses augite in larger quantity. 
B. DIORITIC LAMPROPHYRES. 
The dioritic lamprophyres differ from the syenitic lamprophyres 
in containing plagioclase instead of an alkaline feldspar in addition 
to biotite, amphibole and augite. 
Like the syenitic varieties, these rocks are also developed with 
the panidiomorphie granular and the holocrystalline porphyritic 
structures, : 
Their separation into two classes also depends upon the greater 
or less amount of biotite in their composition. 
1. Kersantitr. This rock is characterized by the possession of 
large amounts of biotite. 
(A) Aschaffite contains quartz and feldspar in addition 
to the iron-bearing minerals in porphyritic devel- 
opment. 
(B) Olivine kersantite contains olivine in addition to the 
essential constituents of the kersantite. 
(b 1) pilite kersantite, in which the olivine’ has been 
altered to pilite. 
2. CAMPTONTTE contains hornblende in place of the biotite of the 
‘kersantites. 
(TO BE CONCLUDED.) 
