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HomeHomework HelpgeologyPetrology of Igneous Rocks

Petrology of Igneous Rocks

Petrology of igneous rocks is the branch of geology that studies the origin, composition, texture, and mineralogy of igneous rocks, which are formed through the solidification of molten material (magma or lava). This field examines the processes that lead to the formation of these rocks and their classification based on chemical and mineralogical characteristics.

intermediate
5 hours
Geology
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Overview

The petrology of igneous rocks is a vital field in geology that focuses on understanding how these rocks form from molten material. By studying the processes of magma formation, cooling, and crystallization, geologists can classify igneous rocks into intrusive and extrusive types, each with distinct...

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Key Terms

Magma
Molten rock beneath the Earth's surface.

Example: Magma can cool to form granite.

Lava
Molten rock that reaches the Earth's surface.

Example: Lava flows can create new landforms.

Intrusive Rock
Igneous rock formed from magma that cools slowly underground.

Example: Granite is an intrusive rock.

Extrusive Rock
Igneous rock formed from lava that cools quickly on the surface.

Example: Basalt is an extrusive rock.

Crystal Growth
The process by which crystals form as magma cools.

Example: Slow cooling allows larger crystals to form.

Volcanism
The eruption of magma onto the Earth's surface.

Example: Volcanism can create new islands.

Related Topics

Sedimentary Rocks
Study of rocks formed from sediment and their processes.
intermediate
Metamorphic Rocks
Exploration of rocks transformed by heat and pressure.
intermediate
Volcanology
The study of volcanoes and volcanic activity.
advanced

Key Concepts

Magma formationCrystal growthRock classificationVolcanic vs. plutonic