Extrusive example sentences

"Extrusive" Example Sentences

1. Extrusive rocks are formed when molten rock is pushed up to the surface.
2. Basalt, andesite, and rhyolite are the most common types of extrusive rocks.
3. Extrusive rocks can form in many different ways, including lava flows and pyroclastic deposits.
4. Extrusive rocks are usually much finer grained than intrusive rocks.
5. Extrusive rocks form quickly, cooling rapidly due to their contact with the atmosphere.
6. Extrusive rocks are usually less resistant to weathering than intrusive rocks.
7. Extrusive rocks are usually darker in color than intrusive rocks.
8. Extrusive rocks are usually composed of minerals that are more mafic in composition.
9. Extrusive rocks often contain large amounts of gas bubbles and vesicles.
10. Extrusive rocks may contain crystals, but they are usually much smaller than those found in intrusive rocks.
11. Extrusive rocks often have a glassy texture due to their rapid cooling.
12. Extrusive rocks are often found in volcanic regions, such as the Ring of Fire.
13. Extrusive rocks may contain crystals that formed when the molten material cooled quickly.
14. Extrusive rocks are often characterized by a layered structure, which is caused by the cooling of the molten material.
15. Extrusive rocks are often associated with volcanic activity, such as lava flows and volcanic eruptions.
16. Extrusive rocks are usually the result of magma that has been forced to the surface by pressure.
17. Extrusive rocks can be identified by their glassy texture and the presence of gas bubbles and vesicles.
18. Extrusive rocks are usually found near the surface, and are often exposed by erosion.
19. Extrusive rocks can be classified based on their composition and texture.
20. Extrusive rocks are usually composed of minerals that are more felsic in composition.

Common Phases

Lava flow; Pyroclastic flow; Ash fall; Lahar; Tuff; Dike intrusion; Sill intrusion; Lava dome; Volcanic bomb.