Igneous+Rocks

identification how type of magma and cooling rate effects crystal sizes formation of igneous rocks mafic rocks felsic rocks lava types magma, how does this differ from lava, what are types of magma intrusive rocks, examples extrusive rocks, examples uses of some of these rocks types found in NY and uses

1. Igneous rocks are rocks which solidify from molten material.

=
3. Igneous rock is formed through the cooling and **solidification ** of magma or lava. ======

4. Mafic is used for silicate minerals, magmas, and rocks which are relatively high in the heavier elements.

5.Felsic, on the other hand, is used for silicate minerals, magmas, and rocks which have a lower percentage of the heavier elements, and are correspondingly enriched in the lighter elements, such as silicon and oxygen, aluminum, and potassium.


 * 6. Lava ** is the molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling.

7. Lava is hot molten rock that erupted from volcano and Magma is hot material below earths crust.

8. Igneous rocks which form by the crystallization of magma at a depth within the Earth are called intrusive rocks.

9. [|Igneous rocks] which form by the crystallization of [|magma] at the surface of the Earth are called extrusive rocks  10. **intrusive igneous rocks ** such as diorite, gabbro, granite and pegmatite that solidify below Earth's surface; 11. Quartz pebbles ; used for granite.
 * extrusive igneous rocks ** such as andesite, basalt, obsidian, pumice, rhyolite and scoria that solidify on or above Earth's surface.