Extrusive definitions
| Word backwards | evisurtxe |
|---|---|
| Part of speech | The word "extrusive" is an adjective. |
| Syllabic division | ex-tru-sive |
| Plural | The plural form of the word "extrusive" is "extrusives." |
| Total letters | 9 |
| Vogais (3) | e,u,i |
| Consonants (5) | x,t,r,s,v |
Extrusive rocks are igneous rocks that form on the Earth's surface as a result of volcanic activity. These rocks are also known as volcanic rocks and are typically fine-grained due to their quick cooling process.
Formation of Extrusive Rocks
Extrusive rocks are formed when magma erupts from a volcano and cools rapidly on the Earth's surface. This rapid cooling prevents the minerals in the rock from growing large crystals, resulting in a fine-grained texture. Examples of extrusive rocks include basalt, andesite, and rhyolite.
Characteristics of Extrusive Rocks
Extrusive rocks are often dark in color and may contain gases or vesicles trapped within the rock from the volcanic eruption. These rocks can also exhibit a glassy texture due to the rapid cooling process. The mineral composition of extrusive rocks can vary, but they often contain minerals such as quartz, feldspar, and olivine.
Uses of Extrusive Rocks
Extrusive rocks have various uses in construction and landscaping due to their durability and strength. Basalt, for example, is commonly used in road construction and building materials. Rhyolite, with its diverse colors and patterns, is often used in decorative applications.
Extrusive rocks play a crucial role in the Earth's geology, providing insight into past volcanic activity and the processes that shape the planet's surface. Studying these rocks can help geologists better understand the Earth's history and dynamics.
Overall, extrusive rocks are a significant part of the Earth's geological makeup, showcasing the power and beauty of volcanic activity and the forces that shape our planet.
Extrusive Examples
- The extrusive lava flow cooled quickly on the surface.
- The extrusive rock had a fine-grained texture.
- The extrusive volcanic ash covered the landscape.
- The extrusive igneous rock formed from volcanic activity.
- The extrusive eruption created a new landmass.
- The extrusive magma erupted from the volcano violently.
- The extrusive pumice stone floated on water.
- The extrusive obsidian glass was sharp and shiny.
- The extrusive tuff rock was used in construction.
- The extrusive scoria rock was porous and lightweight.