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plagioclase (also as phenocrysts if present), augite, hypersthene, 
and ore. 
b. Xenoliths of the augite amphibole hypersthene andesites. 
To these belong first of all some xenoliths of effusive rocks, viz. 
1. hypersthene augite andesite. 
2. Angite amphibole hypersthene andesite, which in its turn contains 
a xenolith of andesite, in which no dark minerals could be recog- 
nized. Also numerous holocrystalline, generally medium-grained xeno- 
liths, occur, viz. 
3. large plagioclase crystals. 
4. brown, or greenish-brown resorbed amphibole in large crystals, 
plagioclase, magnetite. 
5. plagioclase, brown, faintly resorbed, amphibole, little hyper- 
sthene, augite and light-brown glass. 
6. plagioclase, hypersthene, augite, and magnetite. 
7. hypersthene augite diabase porphyrite with much glass. 
8. fine-granular hypersthene augite diabase. 
c. Xenoliths of the augite hypersthene amphibole olivine basalts. 
In these rocks, which rarely occur among the collected material 
also medium-grained xenoliths were found, viz. 
1. plagioclase and brown amphibole. 
d. The other xenoliths. 
Some of these were found as detached fragments without enclosing 
rock, others were detached from the enclosing rock and formed 
separate specimens, so that only the microscopical composition of 
xenolith is known. Probably, however, the enclosing rocks are also 
mainly hypersthene augite andesites. In some xenoliths the composition 
of the central parts differs from that of the marginal zone, the dark 
minerals are accumulated in the central parts. 
The following mineral-combinations were examined: 
1. dark-brown amphibole in large angular and poikilitie non- 
resorbed crystals, plagioclase, little hypersthene, augite, and magnetite. 
2. green amphibole in large angular and poikilitie, non-resorbed 
crystals, plagioclase, little augite, and magnetite. 
3. plagioclase, augite, hypersthene, little, rather strongly resorbed 
brown amphibole, and magnetite. 
4. xenolith with concentration of the dark constituents in the 
central parts, viz. 
Central part: very much green amphibole, magnetite, little plagio- 
clase and little dark-coloured glass with microlites. 
