i have to get this done before christmas which really sucks. this is meant to be my holiday!!
2006-12-18 08:36:11 · 4 answers · asked by shanoodle123 1 in Science & Mathematics ➔ Earth Sciences & Geology
Basaltic magma can be found in hotspots, distructive and constructive plate boundaries for both oceanic and non-oceanic plates, thus it is formed in the mantle, by the melting of the mantle itself, regardless of the crust above it.
Rhylitic magma is found on continental crusts and it is rich in h2o, co2, and silica, suggesting:
1) it does not form in the mantle
2) it is formed through partial melting of of continental crust.
2006-12-25 20:12:45 · answer #1 · answered by Liv 2 · 0⤊ 0⤋
Basalt is a dense magma that the seabed is made of; rhyolite is a melt of granite which is less dense and is the basement rock of landmass. They are generated by heating within the Earth.
2006-12-18 09:17:33 · answer #2 · answered by jim m 5 · 0⤊ 0⤋
The genesis of a magma is governed by the Bowman sequence. I'll let you look it up, but basically the different minerals precipitate out of solution in a particular sequence as a magma cools
2006-12-18 14:40:12 · answer #3 · answered by Anonymous · 0⤊ 0⤋
rhyolitic or granitic magma (felsic in general) is generated by melting intermediate rocks , the source is continental crust .. while basaltic (mafic) mgmas are generated by melting of ultramfic rocks , their source is the mantel ..
2006-12-23 00:14:39 · answer #4 · answered by Geo06 5 · 0⤊ 0⤋