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An igneous rock with a glassy texture cooled from its' liquid state very quickly, an example of this would be obsidian, a volcanic glass.
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What rock is black glassy and was formed by rapidly cooling lava?
The answer is pitchstone. it is and igneous rock.
What type of rock is formed from the quick cooling of lava on the earth's surface?
The type of rock that is formed from the quick cooling of lava on the earth's surface is called extrusive igneous rock. This happens when lava cools and solidifies rapidly, resulting in fine-grained or glassy textures found in rocks such as basalt or obsidian.
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
What are igneous rocks formed at the earths surface called?
Igneous rocks formed at the Earth's surface are called extrusive igneous rocks. They form when magma cools and solidifies quickly on the Earth's surface, resulting in fine-grained or glassy textures. Examples include basalt and rhyolite.
What extrusive igneous rock has a mafic composition and a glassy texture?
Obsidian is an extrusive igneous rock with a mafic composition and a glassy texture. This rock forms from the rapid cooling of lava with high silica content, preventing the growth of mineral crystals and resulting in its glassy appearance.
Is granite a glassy igneous rock?
No, granite is a coarse-grained igneous rock that is made up of minerals like quartz, feldspar, and mica. Glassy igneous rocks, like obsidian, form when molten lava cools quickly on the surface, resulting in a smooth, glass-like texture.
What is the luster of igneous rock?
i think that igneous and metamorphic rocks uses luster because maybe they have it in them
Are large crystals intrusive or extrusive igneous rock?
Large crystals are typically characteristic of intrusive igneous rocks, which form beneath the Earth's surface from slow cooling of magma. Extrusive igneous rocks cool quickly at or near the Earth's surface, resulting in smaller crystals or glassy textures.
What is the difference between an igneous rock with glassy texture and fine texture?
An igneous rock with a glassy texture, such as obsidian, forms when lava cools very rapidly, preventing the formation of crystal structures and resulting in a smooth, shiny surface. In contrast, a fine texture, found in rocks like basalt, occurs when lava cools more slowly, allowing for the development of small, microscopic crystals. The key difference lies in the cooling rate and the resulting crystal sizes: glassy textures have no visible crystals, while fine textures contain tiny crystals that can be distinguished under a microscope.
Texture would be most unlikely to occur in an extrusive igneous rock?
A coarse-grained texture is unlikely to occur in an extrusive igneous rock because it forms quickly at or near the surface, limiting the time for large mineral grains to grow. Instead, extrusive igneous rocks typically have fine-grained to glassy textures due to rapid cooling.
Is glassy igneous rocks intrusive or extrusive?
Glassy igneous rocks are typically extrusive, meaning they form at the Earth's surface from rapidly cooling lava. Intrusive igneous rocks form underground from slowly cooling magma and generally do not have a glassy texture.
How is pumice classified?
Pumice is classified as a felsic, glassy, highly vesicular, extrusive igneous rock.
