GEOL 1001 Chapter : Chapter 4
Document Summary
What is the difference between magma and lava: location: the former is molten rock whereas the latter is molten rock at the earths surface. True/false: an intrusive igneous rock is rock made by the freezing of magma underground, after it has pushed its way into preexisting rock of the crust: true. What does pyroclastic debris consist of: fragments of solidified lava erupted into the air from a volcano. The rate of temperature change with depth inside the earth is called: geothermal gradient. Which of the following phenomena will cause melting to produce magma: transfer of heat from a hot magma into the surrounding wall rock. Which is the correct order of adjectives describing magma composition: felsic/intermediate/mafic/ultramafic. True/false: magma has 3 components: solid, liquid, gas: true. Which of the following is not a factor controlling the large range in magma composition: all of the above are factors in magma composition.
