Ignis

A detailed geological illustration showcasing various types of igneous rocks, their structures, and textures in a vibrant, educational style.

Ignite Your Knowledge: The Igneous Rocks Quiz

Test your understanding of igneous rocks with our engaging quiz! Dive into the world of geology and challenge yourself to identify various structures, compositions, and characteristics of these fascinating formations.

Key Features:

Multiple choice questions
Learn about unique igneous rock structures
Enhance your geological knowledge

15 Questions4 MinutesCreated by ExploringRock214

O Sometimes, an igneous rocks shows parallel or sub parallel bands or streaks w/c are caused by the flow of magma or lava during cooling and crystallization.

� Pillow Structure

� Jointing, sheet structure

� Spherulitic

� Flow Structure

O This is characterized by the development of bulbous, overlapping, pillow like structure in the body of igneous mass. It is typical structure of rock formed from mobile basaltic lava.

� Ropy and Blocky Lava

� Pillow Structure

� Vesicular Structure

� Jointing, sheet structure

O Structural variation developed in the volcanic rocks due to different mobility. Highly viscous “dry” lava undergo very little movement after their eruption and before cooling. Their surface show broken and movement after their eruption

� Ropy and Blocky Lava

� Vesicular Structure

� Jointing, sheet structure

� Orbicular

O Most lava contains large amounts of gas and volatiles. These gas and volatiles escape into the atmosphere when they solidify on the earth’s surface. As a result of this, numerous gas cavities are formed near tops of lava flows. These gas cavities are called the “vesicles” and the volcanic rock contains “vesicles” and the volcanic rock contains structure

� Spherulitic

� Vesicular Structure

� Pillow Structure

� Columnar

Divisional planes which are found in all kinds of igneous rock impressed upon them by force acting from outside.

� Spherulitic

� Orbicular

� Columnar Structure

� Jointing, sheet structure

Typically two-mineral aggregates (mainly quartz and feldspar), formed by initial spherulitic growth of one mineral and later crystallization of a second mineral from the liquid or glass between the fibers.

� Spherulitic

� Orbicular

� Vesicular Structure

� Ropy and Blocky Lava

With uniform cooling and contraction in a homogenous magma, the parting planes tend to:

� Columnar Structure

� Orbicular

� Vesicular Structure

� Jointing, sheet structure

) is an uncommon plutonic rock type which is usually granitic in composition.

� Columnar Structure

� Orbicular

� Vesicular Structure

� Spherulitic

O These rocks cool rapidly or very near the Earth’s surface. o The rapid cooling is due to the great difference in temperature between the hot molten rock and the relatively cool surrounding environment o Fined-grained rocks

� Intrusive Igneous Rocks

� Extrusive Igneous Rocks

� Ultramafic Rocks

� Felsic Rocks

O These rocks cool slowly with the Earth’s crust o The slow cooling enables minerals to grow large o The texture of these rocks are coarse gained

� Ultramafic Rocks

� Mafic Rocks

� Intermediate Rocks

� Intrusive Igneous Rocks

Derived from words feldspar and silica. o Igneous rocks enriched in silica (SiO2) and silicates rich in Al, K, and Na (e.g. feldspar) are called felsic. o These rocks are characteristics of the continental crust (e.g. granite).

� Felsic Rocks

� Intrusive Igneous Rocks

� Extrusive Igneous Rocks

� Ultramafic Rocks

O Roughly even mixtures of felsic minerals (mainly plagioclase) and mafic minerals (mainly hornblende, pyroxene, and/or biotite).

� Felsic Rocks

� Intrusive Igneous Rocks

� Intermediate Rocks

� Ultramafic Rocks

O Igneous rocks with a high proportion of silicates rich in Mg and Fe

� Ultramafic Rocks

� Mafic Rocks

� Felsic Rocks

� Intrusive Igneous Rocks

Rocks composed of large proportion of silicate of Mg and Fe

� Ultramafic Rocks

� Mafic Rocks

� Intermediate Rocks

� Felsic Rocks

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Ignite Your Knowledge: The Igneous Rocks Quiz

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