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An extrusive rock with a composition similar to granite but with smaller crystals?
The rock is likely a rhyolite, which is an extrusive igneous rock with a composition similar to granite but formed from rapidly cooling lava, resulting in smaller crystals. Rhyolite typically exhibits a fine-grained texture due to its quick cooling process at the Earth's surface.
Which igneous rock can be intrusive and extrusive?
A porphyritic igneous rock demonstrates some extrusive characteristics and some intrusive characteristics. The appearance of phenocrysts (larger crystals) in a fine matrix (small crystals) indicates that the magma had time to cool slowly enough underground to form larger crystals before being erupted at or near the surface.
What is the difference between rhyolite and granite?
Rhyolite is a fine-grained, extrusive igneous rock with high silica content, while granite is a coarse-grained, intrusive igneous rock also rich in silica but with larger crystals. Rhyolite forms from cooled lava flows on the Earth's surface, while granite forms from slowly cooling magma beneath the surface.
Do igneous rocks have small crystals large crystals or no crystals?
Igneous rocks can have both small and large crystals, depending on how quickly they cool. If an igneous rock cools slowly beneath the Earth's surface, it can form large crystals, while rapid cooling at the Earth's surface or in an eruption can result in small or no visible crystals.
If granite within earth melts and then erupts at the surface what type of extrusive rock is likely to form?
If granite melts and then erupts at the surface, it is likely to form rhyolite, which is an extrusive rock. Rhyolite has a composition similar to granite but is formed from the rapid cooling of magma at the Earth's surface.
What is an extrusive igneous rock with large crystals?
granite
An extrusive rock with a composition similar to granite but with smaller crystals?
The rock is likely a rhyolite, which is an extrusive igneous rock with a composition similar to granite but formed from rapidly cooling lava, resulting in smaller crystals. Rhyolite typically exhibits a fine-grained texture due to its quick cooling process at the Earth's surface.
What are two properties used to classify igneous rock?
Igneous rocks are usually classified by their chemical composition (acidic or basic), and by whether they formed underground (intrusive, characterised by large mineral crystals) or on the surface (extrusive, made of tiny, microscopic crystals). For instance, basalt is a basic, extrusive rock, and granite is an acidic, intrusive rock.
Which igneous rock can be intrusive and extrusive?
A porphyritic igneous rock demonstrates some extrusive characteristics and some intrusive characteristics. The appearance of phenocrysts (larger crystals) in a fine matrix (small crystals) indicates that the magma had time to cool slowly enough underground to form larger crystals before being erupted at or near the surface.
What is an example of an intrusive igneous rock with large crystals?
Porphyrite of any composition, granite, gabbro, diorite. Most intrusive igneous rocks have crystals large enough to see with the naked eye. Another term used to define an igneous rock with large crystals is coarse-grained.
How can you determine if an igneous rock has had an intrusive or extrusive organ?
by the size of the crystals, big crystals intrusive, small crystals extrusive
What is the difference between rhyolite and granite?
Rhyolite is a fine-grained, extrusive igneous rock with high silica content, while granite is a coarse-grained, intrusive igneous rock also rich in silica but with larger crystals. Rhyolite forms from cooled lava flows on the Earth's surface, while granite forms from slowly cooling magma beneath the surface.
What is a black intrusive rock with small crystals?
Intrusive rock normally has visible crystals. Extrusive igneous rock has small crystals. A black extrusive igneous rock with small crystals could be basalt.
How can you determine if a igneous rock has had an intrusive or extrusive origin?
== Grain size. Most intrusive igneous rocks will have visible crystals. Crystals in most extrusive igneous rocks are not easily visible.
Do igneous rocks have small crystals large crystals or no crystals?
Igneous rocks can have both small and large crystals, depending on how quickly they cool. If an igneous rock cools slowly beneath the Earth's surface, it can form large crystals, while rapid cooling at the Earth's surface or in an eruption can result in small or no visible crystals.
Is granite rock a extrusive rock?
No, granite is the most common intrusive igneous rock.
Is micro granite intrusive or extrusive?
Granite is an intrusive type of igneous rock Also since it is intrusive it cools very slowly and forms large crystals and coarse (large) grained igneous rock.
