What are 6 examples of igneous?
These rocks include: andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff. Pictures and brief descriptions of some common igneous rock types are shown on this page.
What are all examples of igneous rocks?
Types of extrusive igneous rocks include: pumice, obsidian, andesite, rhyolite, and basalt.
Which is not an example of igneous rock?
The correct answer is Dolomite.
How many igneous rocks are there?
There are two types of igneous rocks: intrusive and extrusive.
How many examples of igneous rocks are there?
Keep reading to find 10 examples of igneous rocks and to learn more about the different characteristics of igneous rock types. While the genesis of all igneous rocks is the same, their appearance and locations can be very different.
What are some examples of igneous rocks made of silica?
Rhyolite is another silica-heavy example of igneous rock, prone to explosion in eruptions. Its composition also contains large portions of quartz and feldspar. Eruptions of rhyolite often create the igneous rocks obsidian and pumice. Rhyolite is used to manufacture stone tools but is too soft to be an effective stone tool itself.
What is an example of extrusive igneous rock?
One example of extrusive igneous rock – igneous rock that cools above the surface of the ground rather than beneath – is obsidian. Obsidian is smooth like glass and usually jet black, although it can be seen in a variety of colors. While it is rather fragile, obsidian breaks with a conchoidal fracture and has very sharp edges.
Do all igneous rocks appear the same?
While the genesis of all igneous rocks is the same, their appearance and locations can be very different. The main igneous rock examples can be found both under (instrusive) and above (extrusive) the surface of the Earth, depending on their type.