Igneous Rock Identification and Characteristics

Felsic rock with intrusive texture

• basalt

• rhyiolite

• granite

• diorite

Intermediate igneous rock with aphanitic texture

• andesite

• rhyiolite

• granite

• diorite

Intermediate rock with plutonic texture

• andesite

• granite

• gabbro

• diorite

Intrusive rock that looks like granite, but doesn't have any quartz

• diorite

• gabbro

• syenite

• scoria

Rock with pyroclastic texture

• obsidian

• tuff

• basalt

• andesite

Tags

NGSS.MS-ESS2-1

Intrusive rock of the basalt family

• granite

• pumice

• breccia

• gabbro

Volcanic glass

• pumice

• obsidian

• breccia

• scoria

Mafic, dark, pyroclastic rock with vesicular texture

• pumice

• tuff

• breccia

• scoria

Ultramafic rock, dark green, that is rich in olivine and pyroxene

• peridotite

• gabbro

• basalt

• obsidian

Extrusive, volcanic, mafic rock. Dark black and most common rock in ocean crust. Lots of this in Hawaii

• basalt

• obsidian

• scoria

• gabbro