2006-07-14 07:43:23 · 4 answers · asked by dat dude 1 in Science & Mathematics ➔ Earth Sciences & Geology
A rock that is mostly olivine is called a Dunnite. These are usually associated with the mantle or rocks derived from the mantle. These are only usually found in metamorphic ophiolites (fromn the base of obducted oceanic crust) or as xenoliths (rock from the mantle trapped in a rising magma) in igneous rocks.
2006-07-14 09:01:17 · answer #1 · answered by QFL 24-7 6 · 1⤊ 0⤋
That would be an ultramafic body. And it wouldn't hurt you to check your spelling!
Edit 1: Kevin F is right - in rare cases it could be metamorphic. Either way, the rock would be called dunite, common in ophiolite complexes.
Edit 2: Just a little expansion on the answer by arkiemom - There are two end members of olivine; the magnesium rich variety is forsterite and the iron rich variety is fayalite.
2006-07-14 07:46:30 · answer #2 · answered by minefinder 7 · 0⤊ 0⤋
Since it is a magnesium iron silicate - it can be found almost anywhere volcanic type activity has occured. There are a lot in California and they have even been found on Mars.
2006-07-14 07:50:15 · answer #3 · answered by arkiemom 6 · 0⤊ 0⤋
Depends on where you found it. It could be igneous or metamorphic.
2006-07-14 07:47:57 · answer #4 · answered by Kevin F 3 · 0⤊ 0⤋