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What is an extrusive igneous rock that is actually glass?
Obsidian is an extrusive igneous rock that forms when lava cools quickly and solidifies into a glass-like material without crystal formation. It is typically black in color and has a smooth, glassy texture due to its rapid cooling process.
What igneous rock does not have any minerals in it?
Obsidian is an igneous rock that technically is not composed of minerals. It is a natural glass.
What is the obsidian rock type?
Obsidian is an extrusive felsic igneous rock.
Is glass made out of igneous rock?
no, sedimentry, namely sand
What type of rock is likely to form next when extensive igneous rock is broken down by weathering?
When extensive igneous rock is broken down by weathering, it is likely to form sedimentary rock. The weathering process breaks the igneous rock into smaller particles, which can then be transported and deposited. Over time, these sediments can accumulate and compact, eventually lithifying into sedimentary rock. This transition illustrates the rock cycle, where different rock types can transform through geological processes.
What igneous rock that cooled very quickly and is considered a glass rock?
Obsidian is an igneous rock that forms from lava cooling extremely quickly, preventing the formation of crystals. It is often referred to as a natural glass due to its lack of crystal structure.
Is igneous rock the most common rock in Hawaii?
Yes, igneous rock is the most common type of rock in Hawaii. The Hawaiian Islands were formed primarily by volcanic activity, resulting in a landscape dominated by basalt, a type of igneous rock. As volcanoes erupt and lava flows cool and solidify, they create extensive igneous rock formations. Other rock types are present, but they are far less common compared to the pervasive igneous rock.
What igneous rock has a smooth glass like texture?
Obsidian is an igneous rock that has a smooth glass-like texture. It is formed when lava cools rapidly without crystal formation, resulting in a glassy texture.
Is volcanic glass an intrusive or extrusive igneous rock?
Volcanic glass is an extrusive igneous rock. It forms when molten lava cools quickly on the Earth's surface, preventing the formation of crystals.
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.
Where is Obsidian?
Obsidian is a naturally occurring glass formed as an extrusive igneous rock
What is the igneous rock obsidian often called?
It is commonly called "volcanic glass".
