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Yes the Obsidian does cool quickly and the vesicular basalt

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What is it called when igneous rocks cool quickly?

obsidian


Some extrusive igneous rocks such as obsidian are glassy because they are what?

They cool to quickly for crystals to form.


Does obsidian cool quickly or slowly?

it cool quickly but i dont know know how. i have a science homework do tomarrow and i know it cools quickly, but another question is how do you know. i cant just right that i googled it!!!! HELP


Some extrusive igneous rocks such as obsidian are glassy because they?

cool too quickly for mineral grains to form, resulting in a non-crystalline structure.


How obsidian rocks form?

They are formed when either a sedimentary rock or a metamorphic rock are exposed to high heat and turn into magma and then cool quickly.


Igneous rocks that cool quickly on earth surface are?

Igneous rocks that cool quickly on the Earth's surface are called extrusive or volcanic rocks. Examples include basalt, obsidian, and pumice. These rocks have fine-grained textures due to their rapid cooling.


A black rock formed from cooled lava?

Obsidian


What is the origin of obsiadan?

If you are asking about how they were formed magma from volcano that are shot in the air of quickly spewed out causing the magma to cool very quickly forming a very smooth surface on obsidian. Becuase the magma cooled so fast it couldn't slowly cool into a rough textured rock.


How some extrusive igneous rocks such as obsidian are glassy is because they?

cool very quickly, preventing mineral crystals from forming. This rapid cooling process solidifies the lava before crystals have a chance to develop, resulting in a smooth, glassy texture. The lack of mineral crystals gives obsidian its unique appearance and properties.


Did obsidian cool quickly or slowly?

Obsidian cooled very quickly. It's a vulcanic glass, meaning that the crystals are so small, they had virtually no time to form an orderly crystalline texture, and are basically placed randomly. Smaller grain size is associated with faster cooling.


What location is the obsidian rock?

Obsidian are volcanic Glasses that cool very rapidly. The crystals are not allow to arrange them self's that is why Obsidian has not 3d internal structure. The are Igneous Glasses


What type of crystal forms when igneous rocks cool too quickly?

Actually, if lava cools quickly enough, there can be situations where no crystallization takes place at all. Such is the case with obsidian. Rapid cooling usually translates into small crystal formation.