Igneous rock is one of the three main rock types, the others being sedimentary
and .... The classification of the many types of different igneous rocks can provide
us with important information abou...
Photographs and descriptions of intrusive and extrusive igneous rocks with links
to detailed articles by Geology.com.
Extrusive igneous rocks form when magma reaches the Earth's surface a volcano
and cools quickly. ... Examples include basalt, rhyolite, andesite, and obsidian.
Apr 9, 2010 ... Different types of magma are associated with different volcanoes. When the
volcanoes erupt, different types of rock are formed – basalt, ...
The earth is made of igneous rock - at least at the surface where our planet is
exposed to the coldness of space. Igneous rocks are given names based upon
Find interesting information and a range of examples that help explain what
igneous rocks are and what makes them different from other kinds of rocks.
Scientists have divided igneous rocks into two broad categories based on where
the ... These rock types all have different characteristics, including temperature ...
This is a pictorial example of igneous rocks. ... to 1250° C. Basalt is the most
common rock type in the Earth's crust most of the ocean floor is made of basalt.
The two main types of igneous rocks are plutonic rocks and volcanic rocks.
Plutonic ... There are many different compositions of magma and lava.
Dec 16, 2015 ... All told, there are over 700 known types of igneous rock , the majority ... igneous
rocks than between different types of intrusive igneous rocks.