<Dd> Distribution: divergent plate boundaries, hot spots, convergent plate boundaries </Dd> <Dl> <Dd> Intermediate (andesitic) <Dl> <Dd> SiO ~ 60% </Dd> <Dd> Fe--Mg: ~ 3% th </Dd> <Dd> Temperature: ~ 1000 ° C </Dd> <Dd> Viscosity: Intermediate </Dd> <Dd> Eruptive behavior: explosive or effusive </Dd> <Dd> Distribution: convergent plate boundaries, island arcs </Dd> </Dl> </Dd> </Dl> <Dd> Intermediate (andesitic) <Dl> <Dd> SiO ~ 60% </Dd> <Dd> Fe--Mg: ~ 3% th </Dd> <Dd> Temperature: ~ 1000 ° C </Dd> <Dd> Viscosity: Intermediate </Dd> <Dd> Eruptive behavior: explosive or effusive </Dd> <Dd> Distribution: convergent plate boundaries, island arcs </Dd> </Dl> </Dd> <Dl> <Dd> SiO ~ 60% </Dd> <Dd> Fe--Mg: ~ 3% th </Dd> <Dd> Temperature: ~ 1000 ° C </Dd> <Dd> Viscosity: Intermediate </Dd> <Dd> Eruptive behavior: explosive or effusive </Dd> <Dd> Distribution: convergent plate boundaries, island arcs </Dd> </Dl>

Where might magma rise to the earth's surface