192 



AUX. 6. — B. KOTO : 



'y^^h. 



4;:,p 



colored light -green 

 in centre, then 

 bluish green, and 

 lastly, brownish 

 on margin. The 

 last zone may be 

 easily mistaken for 

 a dioritic horn- 

 blende. The last 

 but not least com- 

 ponent are color- 

 less . elongated 

 plates with high 

 birefringence, posi- 

 tive character and 

 a maximum ex- 

 tinction-angle of 

 about 26 \ It 

 seems to be tre- 

 molite wdtli amphibole cleavage.'^ Tiie whole is cemented by 

 w^hitish or dirty residual glass. 



The y type— the lithoid microtinite, is, in contrast to the a 

 type, dull- white and slightly porous, and closely resembles the third 

 type of cerainlcite (p. 200). Microscopically, it is composed of 

 anhedral microphenocrysts (0.4 mm.) of plagioclase imbedded in the 

 groundmass of denticulated grains (0.040 to 0.015 mm.) of the 

 same mineral. A few slender needles of diopside are intermixed 





Fig. 42.— Ejecta of diopside-gabbro, a secretionary i>rodurt of 



angite-andesite. Eight-hand figure is the cross section. 



Log. : Eastern slope of the Middle Cone. 



101 X 8 <™. 



1) It looks very much like ■nujI.la.sfißv.Uc in the nodule comijosed of anorthite and pyroxenes, 

 which nodule is allotted to the category of the polygciiovs endogene enrjavs in Lacroix's 

 'Montagne Pelée et ses éruptions,' p. 537. 



