extrusive in a sentence
a.
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Definition
Extrusive refers to volcanic rock or processes that occur when magma erupts onto the Earth's surface and cools rapidly.
Sample Sentences
- Extrusive volcanic rock forms when lava cools quickly upon reaching the Earth's surface.
- The landscape was shaped by extrusive processes, creating dramatic cliffs and valleys.
- Geologists study extrusive igneous formations to understand the history of volcanic activity in the region.
- Extrusive materials can often be identified by their fine-grained texture and lack of large crystals.
- The presence of extrusive lava flows indicates a relatively recent volcanic eruption in the area.