How to Describe the Earth's Crust

Diabase diorite gabbro granite pegmatite and peridotite. Intrusive igneous rocks crystallize below Earths surface and the slow cooling that occurs there allows large crystals to form.

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We describe these two basic types.

. Isostasy Greek ísos equal stásis standstill or isostatic equilibrium is the state of gravitational equilibrium between Earths crust or lithosphere and mantle such that the crust floats at an elevation that depends on its thickness and density. Some form on or above Earths surface. Extrusive igneous rocks erupt onto the surface where they cool.

This concept is invoked to explain how different topographic heights can exist at Earths surface. Examples of intrusive igneous rocks are.

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Pin On Facts About Planet Earth Structure For Kids

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