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Temperatures of most magmas are in the range 700 °C to 1300 °C.

Magma can get forced into adjacent rocks (intrusion or plutonic), or forced out to the surface (extrusion or volcanic) as lava, or blown out in exposions which include rock pieces (tephra).

Although geologists would do a chemical analysis before identifying andesite in a published paper, in the field they readily call a gray or medium-red lava andesite.

Andesite gets its name from the Andes mountains of South America, where arc volcanic rocks mix basaltic magma with granitic crustal rocks, yielding lavas with intermediate compositions.

ANSWER: Igneous rock is one of three basic kinds of rock, along with sedimentary and metamorphic rock.

The word igneous comes from the Latin word, ignis, which means fire.

In general, color is a good clue to the silica content of lavas, with basalt being dark and felsite being light.(The nucleus of an atom is made up of protons and neutrons.) For example, the element carbon, which always has six protons in its nucleus, has three isotopes: one with six neutrons in the nucleus, one with seven, and one with eight.Some isotopes are stable, but some are unstable or radioactive.Igneous rock is one of the three main rock types, the others being sedimentary and metamorphic rock. The material is made liquid by the heat inside the Earth's mantle.When magma comes out onto the surface of the Earth, it is called lava.Pictures of Igneous Rocks Igneous rocks are those that form via the process of melting and cooling.