Video encyclopedia

Volcanic rock


What Types of Rock are made by Volcanic Eruptions? (Part 3 of 6)


Stand Awakening Golden Experience Volcanic Rock


Difference between volcanic and plutonic rocks


Lava Stone | Volcanic Rock | Benefits of Wearing | Uses


Splitting a volcanic rock in the old fashioned way

Volcanic rock is a rock formed from magma erupted from a volcano. In other words, it differs from other igneous rock by being of volcanic origin. Like all rock types, the concept of volcanic rock is artificial, and in nature volcanic rocks grade into hypabyssal and metamorphic rocks and constitute an important element of some sediments and sedimentary rocks. For these reasons, in geology, volcanics and shallow hypabyssal rocks are not always treated as distinct. In the context of Precambrian shield geology, the term "volcanic" is often applied to what are strictly metavolcanic rocks.
    • Characteristics 

    • Naming 

    • Composition of volcanic rocks