Igneous rock as extrusive rocks. Igneous rock may form with crystallization to form granular, crystalline rocks, or without crystallization to form natural glasses. Igneous and metamorphic rocks make up 90–95% of the top 16 km of the Earth's crust by volume. Igneous rocks form about 15% of the Earth's current land surface. Most of the Earth's oceanic crust is made of igneous rock. Igneous rocks are also geologically important because: In terms of modes of occurrence, igneous rocks can be either intrusive (plutonic and hypabyssal) or extrusive (volcanic). Intrusive igneous rocks are formed from magma that cools and solidifies within the crust
Electric Magma Electric Magma Electric Magma is an instrumental heavy riff rock band from Toronto, Ontario, Canada. Electric Magma was formed between 2000-2001 by Tryg Smith, Tim Reesor and Tom Brouard. Influenced by the stoner rock movement from the mid 90's (Fu Manchu, Kyuss, Clutch, Corrosion of Conformity), Electric Magma is known for their improvised style of riff-based rock music. Electric Magma has released seven full-length albums. Smith and Reesor, the core songwriters, remain the sole founding members. All of Electric Magma's albums have been released by Around Ahead Music, the bands record label. Electric Magma's 2012 release: "Canadian Samurai II" was