a. granitic composition
b. andesitic composition
c. ultramafic composition
d. basaltic composition
2007-09-20 15:33:14 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
a
2007-09-20 16:31:23 · answer #1 · answered by Don Y 2 · 1⤊ 0⤋
A.
Basalt rocks are mafic in composition so ultramafic is an extreme example of basalt rocks. Andesite is a mixture of granite and basalt. Granite is felsic by nature, which contain quartz and feldspar.
2007-09-21 13:23:58 · answer #2 · answered by CSW 3 · 1⤊ 0⤋
a million.gabbro: pyroxene, plagioclase, amphibole, and olivine. however there's a quartz gabbro. 3.andesite: plagioclase, pyroxene and/or hornblende 4.basalt: < 20% quartz, < 5% ok-spar. pass with PR&M.
2016-11-06 00:15:25 · answer #3 · answered by Anonymous · 0⤊ 0⤋
d.
2007-09-20 15:41:37 · answer #4 · answered by Pinyon 7 · 0⤊ 1⤋