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Igneous rocks often have a fine-grained or glassy texture. These textures typically occur in volcanic rocks, such as basalt and rhyolite, where rapid cooling of lava prevents large crystals from forming. Additionally, obsidian is a volcanic glass that exhibits a glassy texture due to its rapid cooling and lack of crystal structure.
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What is the texture of the rock andesite?
The texture of Andesite rock is fine-grained and it Extrusive plus it is an igneous rock .
What texture do igneous rock have when magma cools?
It can be described as aphanitic. This just means that the rock has very small, hard to see crystals. The crystals do not have time to grow large when they are exposed to the air so they cool quickly and remain small. If water is added to the melt, the texture can be described as glassy (like obsidian).
Is pumice rock vesicular and glassy?
Yes. Pumice is so fine-grained, often times it's crystals are vesicular and glassy.
Which igneous rocks would be formed by the fastest cooling of lava?
Glassy textured extrusive igneous rock, such as obsidian.
What is the texture for siltstone rock?
Siltstone is gritty to the touch. It has the texture of a very fine-grained sandpaper
What kind of texture does obsidian rock has?
Glassy, but I could be wrong. Glassy usually relates to a rock that doesn't have any visible particles (like fine-er than fine grained).
What is the texture of Travertine rock?
it is fine-grained
How can you tell that scoria is an extrusive rock?
It is fine grained to glassy and contains vesicles.
What is the texture of the rock andesite?
The texture of Andesite rock is fine-grained and it Extrusive plus it is an igneous rock .
What is the texture of adakite?
Typically porphyritic with hbl phenocrysts.
What texture do igneous rock have when magma cools?
It can be described as aphanitic. This just means that the rock has very small, hard to see crystals. The crystals do not have time to grow large when they are exposed to the air so they cool quickly and remain small. If water is added to the melt, the texture can be described as glassy (like obsidian).
Is pumice rock vesicular and glassy?
Yes. Pumice is so fine-grained, often times it's crystals are vesicular and glassy.
Which igneous rocks would be formed by the fastest cooling of lava?
Glassy textured extrusive igneous rock, such as obsidian.
If there are small crystals in a rock what is it called?
The rock is said to have a fine-grained texture, also referred to as an aphanitic texture.
What is the texture for siltstone rock?
Siltstone is gritty to the touch. It has the texture of a very fine-grained sandpaper
What is felsite?
Felsite is a fine-grained volcanic rock composed mostly of feldspar and quartz. It is generally light in color and often has a smooth texture. Felsite is commonly used in construction and as a decorative stone.
What is the size of crystals in an igneous rock called?
The size of crystals in an igneous rock is called texture. Texture can range from fine-grained (small crystals) to coarse-grained (large crystals).
