At depths of about 30-80 km, the rock that started as lowly DIRT and metamorphosed into a glimmering beauty is at such high temperatures and pressures that there is enough energy for beautiful garnet crystals to grow. We are nearing melting temperatures, but not quite. This is still a solid rock, but the high pressure-temperature conditions allow the rock to behave like playdoughGroup of answer choicesmarblegneissslateschist

All metamorphic rocks are created in the presence of high heat and high pressure.Group of answer choicesTrueFalse

A type of rock that forms under high temperature and pressure but is not exposed to enough heat to melt the rock

Extrusive igneous rocks form from lava which has cooled and solidifiedquickly, deep undergroundquickly, on Earth's surfaceslowly, on Earth's surfaceslowly, deep underground

At a depth of 32 km, basaltic rock melts at around 1,400°C but this same rock will melt at only 1,250°C at Earth's surface.  Group startsTrue or False

Extrusive Igneous rocks will form?Deep undergroundAt Earth's surface