The magmas formed beneath spreading ridges are always felsic.
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Q4: Mafic magma is silica poor and may
Q5: Magma chambers generally exist at depths of
Q6: Viscosity of a magma provides an indication
Q7: Mafic magma has lower viscosity.
Q8: Felsic lavas would tend to be slow
Q10: Magma composition may change by crystal settling.
Q11: Partial melting explains the origin and composition
Q12: Magmas formed at subduction zones are mostly
Q13: Phaneritic textures indicate that the rock formed
Q14: Porphyritic textures suggest a complex cooling and
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