olivine
basalt
A. quartz
B. mica
C. calcite
D. obsidian
E. feldspar
2. What fraction of the mass of the crust consists of this mineral?
A. less than a quarter
B. between a quarter and a half
C. between half and three-quarters
D. more than three-quarters
2007-03-25 00:52:20 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
It is definitely quartz. A
The exact crustal abundance of quartz is difficult to estimate - (I doubt whether anyone has done that at all). But it is likely to be less than 25%. So the answer is again A.
2007-03-25 04:12:37 · answer #1 · answered by saudipta c 5 · 0⤊ 0⤋
Quartz. I am not sure of the amount but I would hazard a guess of less than a quarter.
2007-03-25 03:51:38 · answer #2 · answered by Amphibolite 7 · 0⤊ 0⤋
A & A. Are we doing your homework? hehe
2007-03-25 04:48:51 · answer #3 · answered by Christopher M 1 · 0⤊ 0⤋
1.Dirt, rock and water
2. 100%
2007-03-25 00:59:39 · answer #4 · answered by John S 6 · 0⤊ 2⤋