Magma_class test1

Basaltic magma is formed by partial melting of rocks at

• upper mantle

• outer core

• mid mantle

• crust

Basaltic magma is formed by partial melting of

• basaltic rocks

• peridotitic rocks

• andesitic rocks

• rhyolitic rocks

Depleted mantle (restite left after partial melting) is made up of

• peridotite

• pyroxenite

• dunite

• basalt

The most abundant mineral in the earth is

Partial melting of the mantle at divergent plate margins are due to

• addition of fluids

• frictional heating

• decompression

• heat transfer