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What does obsidain's glassy texture indicate about how magma cooled?
Wiki User
∙ 12y ago
It cooled quickly so no holes formed in it.
Wiki User
∙ 12y ago
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What is the difference between an igneous rock with a glassy texture and one with a fine texture?
The main difference is that the glassy textured igneous rock cooled from lava with extreme quickness, while the one with a fine texture cooled less quickly. Obsidian is a natural glass, created by rapidly cooling lava, where mineral crystals do not have enough time to form before the lava solidifies.
Does scoria have a glassy texture?
No.
Lava that cools so quickly that ions do not have time to arrange into crystals will form igneous rocks with a?
glassy texture
What do large crystal grains in an igneous rock indicate?
A vesicular igneous texture generally indicates rapid cooling.
Is Obsidian formed when rapidly cooling ions are randomly distributed creating a texture?
Glassy
What texture of obsidian?
Obsidian is an extrusive rock that cooled very rapidly without forming crystals. As a result, obsidian has a smooth, shiny texture of a thick piece of glass.
How do Igneous rock with glassy textures?
An igneous rock with a glassy texture cooled from its' liquid state very quickly, an example of this would be obsidian, a volcanic glass.
What is the difference between an igneous rock with a glassy texture and one with a fine texture?
The main difference is that the glassy textured igneous rock cooled from lava with extreme quickness, while the one with a fine texture cooled less quickly. Obsidian is a natural glass, created by rapidly cooling lava, where mineral crystals do not have enough time to form before the lava solidifies.
What texture does obsidian have?
A glassy texture.
Does scoria have a glassy texture?
No.
Why is a igneous rock appear smooth and glassy?
Some igneous rocks are very smooth and glassy (obsidian) while others have a very rough texture, such as the rocks used on the bottom of a propane gas grill. They are all formed from lava, but the glassy rocks cooled so fast that crystals did not have a chance to form. The rougher rocks cooled more slowly, allowing larger crystals to form--Slower cooling = larger crystals = rougher texture.
What color is obsididan?
Black, it has a glassy texture.
What igneous rocks does not have a glassy texture?
basalt
What type of rock is formed when an igneous rock is cooled very rapidly?
When magma is cooled, it forms an igneous rock. When magma is cooled rapidly, that igneous rock is of the category called "extrusive" or "volcanic". When the magma is cooled very rapidly, the extrusive igneous rock formed will probably be holohyaline (glassy) in texture, or foamy like pumice.However if you take an igneous rock that is already rock and cool that very rapidly it will probably shatter owing to thermal stress. That might result in the formation of tuff.
What is the texure of obsidian?
Obsidian is an igneous rock with a glassy texture. Its texture is also called hyaline, the Greek word for texture.
What are rocks that have a glassy texture called?
Obsidian
Lava that cools so quickly that ions do not have time to arrange into crystals will form igneous rocks with a?
glassy texture
