PLOS Thesaurus

Last uploaded: September 21, 2017

Id	http://localhost/plosthes.2017-1#11851 http://localhost/plosthes.2017-1#11851
Preferred Name	Volcanic rocks
Type	http://www.w3.org/2004/02/skos/core#Concept

prefLabel	Volcanic rocks
homepage	http://journals.plos.org/plosone/browse/volcanic_rocks
type	http://www.w3.org/2004/02/skos/core#Concept http://www.w3.org/2002/07/owl#NamedIndividual
Previous_Classification	30.50.70.10^Volcanic rocks
alpha	Volcanic rocks
scopeNote	Among igneous rocks, i.e. those formed from magma or molten rock, the most important difference may be between plutonic and volcanic rocks. Plutonic rocks are formed underground. They involve the "intrusion" or insertion of magma between other rocks, which then cools below the surface. Volcanic rocks are formed above ground. They involve the "extrusion" or eruption of magma, which then is called "lava." The lava cools upon or very close to the surface. Volcanic rocks can also form from "ash", which is simply pulverized rock blown into the air (not like the "ash" that results from burning wood) -- larger rocks are "bombs." http://www.friesian.com/pluton.htm RD
broader	http://localhost/plosthes.2017-1#1495
status	Accepted

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