What Type Of Rocks Are Granite Basalt Pumice And Obsidian

Magma that has reached the surface is lava.

What type of rocks are granite basalt pumice and obsidian. Igneous rocks that solidified within the crust are plutonic or intrusive rocks. Gabbro andesite pegmatite basalt pumice porphyry obsidian granite and tuff. There are more than 700 types of igneous rocks. These rocks are the major continental rocks.

Magma volcanism and igneous rocks every igneous rock has a story to tell that geologists can unravel by considering the rock s. Still there is a fundamentally sound reason to talk about such a vague concept as a rock type because these assemblages occur again and again in many different locations. Gabbro andesite pegmatite basalt pumice porphyry obsidian granite and tuff. Dacite is a fine grained extrusive igneous rock that is usually light in color.

Types of igneous rocks. These rocks include andesite basalt dacite obsidian pumice rhyolite scoria and tuff. Scoria like pumice is a lightweight extrusive rock. Pictures and brief descriptions of some common igneous rock types are shown on this page.

Igneous rocks from left to right. A few examples for types of igneous rocks are granite scoria or basalt pumice and obsidian. Another name for scoria is volcanic cinders and the landscaping product commonly called lava rock is scoria as is the cinder mix widely used on running tracks. Granite rocks form due to the slow cooling of pockets of magma deep below the earth s surface.

Molten rock material below the surface is called magma.