With the aid of a diagram discuss the formation of three extrusive volcanic features
Answers
Explanation:
Volcanic landforms are divided into extrusive and intrusive landforms based on whether magma cools within the crust or above the crust.
Rocks formed by the cooling of magma within the crust are called Plutonic rocks.
Rocks formed by the cooling of lava above the surface are called Igneous rocks.
In general, the term ‘Igneous rocks’ is used to refer to all rocks of volcanic origin.
Extrusive and Intrusive volcanic landforms
Extrusive Volcanic Landforms
Extrusive landforms are formed from material thrown out to the surface during volcanic activity.
The materials thrown out include lava flows, pyroclastic debris, volcanic bombs, ash, dust and gases such as nitrogen compounds, sulphur compounds and minor amounts of chlorine, hydrogen and argon.