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Granite gneiss is a metamorphic rock and would not be considered extrusive (rock formed from molten material at or near the surface).
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What is the texture of Intrusive igneous rocks?
An igneous rock has two different textures. Extrusive rocks generally are smooth and glassy. Intrusive rocks are generally coarse
Igneous rocks are described as intrusive or extrusive based on?
Igneous rocks are described as intrusive or extrusive based on formation. Intrusive rocks forms underneath the earth surface, while extrusive rocks forms on the surface of earth.
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
Is marble an extrusive or an intrusive rock?
Neither. The terms intrusive and extrusive apply to igneous rocks; marble is metamorphic.
What kind of igneous rocks for on earths surface?
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
What is the texture of Intrusive igneous rocks?
An igneous rock has two different textures. Extrusive rocks generally are smooth and glassy. Intrusive rocks are generally coarse
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Can rocks both have igneous and intrusive?
Since igneous rocks are divided into two categories (intrusive and extrusive) an igneous rocks can be intrusive.
What is the difference between an intrusive and an extrusive igneous rocks?
"intrusive" means forced into something, "extrusive" means forced out onto the surface. The igneous magma reaching the surface is therefore extrusive , producing extrusive igneous rocks, and all the rest of the magma is intrusive, producing intrusive igneous rocks.
What are the main two types of igneous rocks?
Igneous rocks are classified as either extrusive or intrusive. Extrusive rocks form from lava at or above the ground, and intrusive rocks form from magma below the ground. Granite is intrusive, pumice is extrusive.
Is schist an intrusive or extrusive rock?
Neither, Igneous rock is either intrusive or extrusive. Thats what intrusive and extrusive is... A igneous rock.
Igneous rocks are described as intrusive or extrusive based on?
Igneous rocks are described as intrusive or extrusive based on formation. Intrusive rocks forms underneath the earth surface, while extrusive rocks forms on the surface of earth.
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
Where are the two types of igneous rocks made?
Extrusive igneous rocks , Intrusive igneous rocks
Is marble an extrusive or an intrusive rock?
Neither. The terms intrusive and extrusive apply to igneous rocks; marble is metamorphic.
Is feldspar extrusive or intrusive?
It is actually a mineral that appears in both extrusive and intrusive igneous rocks.
Is extrusive a rock?
Igneous rocks can be categorized as either extrusive or intrusive.
