How is vesicular basalt formed?
Vesicular basalt is formed when magma erupts from a volcano in the form of lava and it quickly hardens. This makes it an extrusive igneous rock….
What is vesicular texture and how does it form?
Vesicular texture occurs when gases are trapped within a lava flow and minerals crystallize around the gas pocket.
Which volcanic rocks have a vesicular texture?
Vesicular texture — basalt scoria: This is an extrusive igneous rock that chilled very quickly, so that the bubbles (vesicles) formed by escaping gas were preserved.
How does volcanic rock develop?
Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.
What does vesicular basalt look like?
Vesicular basalt is a dark-colored volcanic rock that contains many small holes, more properly known as vesicles. Sometimes, vesicles can become filled in with secondary minerals, such as calcite, quartz, or zeolites.
What is vesicular basalt used for?
Basalt is used for a wide variety of purposes. It is most commonly crushed for use as an aggregate in construction projects. Crushed basalt is used for road base, concrete aggregate, asphalt pavement aggregate, railroad ballast, filter stone in drain fields, and may other purposes.
What is vesicular rock?
Jackson, eds) defines vesicle as “a small cavity in an aphanitic or glassy igneous rock, formed by expansion of a bubble of gas or steam during solidification of the rock.” Such a rock is said to be vesicular. Only igneous rocks – rocks that cooled from a molten magma – can have vesicles.
What is the texture of gabbro rock?
Gabbro is mafic, intrusive, coarse-grained rock with allotriomorphic texture.
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