0
yes, it does. when a grain size in an igneous rock is small, it means that it was probably an extrusive rock, meaning it formed on land. but if the grain size is big, it means that the rock most likely formed underground, or it was intrusive. try remembering it like this- the larger the crystals, the more time the rock had to form, and magma cools faster on land, not giving the rocks much time to form.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What are rocks that have a glassy texture called?
Obsidian
Is conglomerate intrusive or extrusive?
Neither. Conglomerate is a sedimentary rock. Intrusive and extrusive are descriptive terms used to classify igneous rocks.
What is the most common type of rock on earth's surface?
Sedimentary Rocks. 75% of rocks exposed to the surface are sedimentary.
What are the 3 kinds of rocks?
Sedimentary, Igneous and Metamorphic.
What are igneous extrusions?
== == Extrusive igneous rocks are formed from the solidification of lava on or above the surface. Rapid cooling from exposure to air or water results in rapid crystallization of their component minerals, normally creating a fine grained texture as opposed to intrusive igneous rocks which have a coarser texture. Examples of extrusive igneous rocks would include obsidian, pumice, basalt, and rhyolite.
What grain type is found in extrusive igneous rocks?
Extrusive igneous rocks are usually fine grained.
What are the three colors used in identifying igneous rocks?
yellow green and red
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.
How are igneous rocks classified acording to their..?
Igneous rocks are classified by either being intrusive or extrusive, then mafic or felsic then they are classified by either fine grain or course grained textures.
What distinguishing physical feature is used in identifying Igneous rocks?
Hardness of rock (by using mohr's scale)
Are igneous rocks strong?
Igneous rocks can be strong due to their interlocking grain textures
When molten rocks cools what rocks form?
igneous rocks
What is the grain size of an extrusive igneous?
It depend what rock it is but extrusive rocks generally non-crystalline or have a grain size of less than 1 mm
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
An example of a plutonic rock is?
yes. because anything you can feel is an example of matter
Are igneous rocks made up of igneous rocks?
Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.
What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?
Igneous rocks are formed by the solidification of molten materials.
