0
Extrusive rocks which cool more rapidly than intrusive rocks generally have?
Wiki User
∙ 13y ago
Extrusive rocks which cool more rapidly than intrusive rocks generally have smaller crystals.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Is feldspar extrusive or intrusive?
It is actually a mineral that appears in both extrusive and intrusive igneous rocks.
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 meant by intrusive or extrusive rocks?
Intrusive or extrusive are terms given to igneous rocks which describe where the rock cooled and formed, since this plays an important role in the cooling time of the rock and therefore grain size of the rock. Intrusive rocks are those that cool from magma before it reaches the surface of the earth (they form inside the earth, hence the term intrusive). Extrusive rocks form by erupting or "extruding" at the surface and cooling. Intrusive rocks take a long time to cool because the surrounding rocks act as a kind of blanket and keep it warm longer, so crystals are generally large, where extrusive rocks cool quickly being exposed to air, wind, and rain, so crystals are generally small.
Is peridot an intrusive or extrusive igneous rock?
Peridot is olivine, which is a mineral, not a rock. It is found in both intrusive and extrusive 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.
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
Is this true or false Intrusive rocks have smaller crystals than extrusive rocks?
Generally, false. Intrusive rocks cool far more slowly than extrusive ones, so the crystals have time to grow larger.
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
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.
Does lava produce Extrusive or Intrusive rocks?
extrusive
Is feldspar extrusive or intrusive?
It is actually a mineral that appears in both extrusive and intrusive igneous rocks.
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.
Contrast the ways in which extrusive and intrusive rocks are formed?
Intrusive rocks form within the crust of the Earth while extrusive rocks form on the surface.
Are intrusive rocks volcanic?
No. Volcanic rocks are extrusive. Intrusive rocks are sometimes called plutonic.
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 marble an extrusive or an intrusive rock?
Neither. The terms intrusive and extrusive apply to igneous rocks; marble is metamorphic.
