Question

How are extrusive and intrusive rocks formed?
Give examples of each.
​

Answer 1

Explanation:

Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground.Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet. ... If lava cools almost instantly, the rocks that form are glassy with no individual crystals, like obsidian.

Answer 2

Explanation:

The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.

Examples of intrusive igneous rocks are diabase, diorite, gabbro, granite, pegmatite, and peridotite. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. Some cool so quickly that they form an amorphous glass.

please mark it as BRAINLIEST..