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Is basalt an intrusive rock or extrusive rock?
Extrusive. Solidifies above ground level.
Is schist an intrusive or extrusive rock?
Neither, Igneous rock is either intrusive or extrusive. Thats what intrusive and extrusive is... A igneous rock.
Is a metamorphic rock intrusive or extrusive?
It is neither. Intrusive and extrusive are terms used to describe igneous rock.
Is Obsidian an extrusive rock or intrusive rock?
Yes it is extrusive love yall
Are basalt extrusive or intrusive?
Basaltic rock are true to be extrusive 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.
Why would you except the crystals in a intrusive rock to be larger than the crystals in a extrusive rock?
Minerals formed in intrusive rock cool more slowly than extrusive rock, which is closer to the surface. The longer cooling period allows more time for crystal formation.
Why would you expect the crystals in an intrusive rock to be larger than the crystals in the extrusive rock?
Because as an intrusive rock cools underground, it will normally cool more slowly than an extrusive (surface) rock. The slow cooling allows more time for the crystals to grow.
Is extrusive a rock?
Igneous rocks can be categorized as either extrusive or intrusive.
What are the types of Igneous rock?
extrusive and intrusive
What are the type of igneous rock?
extrusive and intrusive
Why is intrusive rock usually harder than extrusive rock?
Intrusive rock cools slowly beneath the Earth's surface, allowing larger mineral crystals to form, making the rock harder. Extrusive rock cools quickly on the Earth's surface, leading to smaller crystals and a softer composition.
