_:b1218141	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2002/07/owl#Axiom> .
_:b1218141	<http://www.w3.org/2002/07/owl#annotatedTarget>	"A marine ultramafic hydrothermal vent biome comprises regions of themarine  hydrothermal vent biome hosted on ultramafic (also referred to as ultrabasic) rocks. Ultramafic rocks are igneous and meta-igneous rocks with very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are composed of usually greater than 90% mafic minerals  (dark colored, high magnesium and iron content). The Earth's mantle is composed of ultramafic rocks."^^<http://www.w3.org/2001/XMLSchema#string> .
_:b1218141	<http://www.w3.org/2002/07/owl#annotatedSource>	<http://purl.obolibrary.org/obo/ENVO_01000053> .
_:b1218141	<http://www.geneontology.org/formats/oboInOwl#hasDbXref>	"PLB:plb"^^<http://www.w3.org/2001/XMLSchema#string> .
_:b1218141	<http://www.geneontology.org/formats/oboInOwl#hasDbXref>	"ISBN:044482619X"^^<http://www.w3.org/2001/XMLSchema#string> .
_:b1218141	<http://www.geneontology.org/formats/oboInOwl#hasDbXref>	"Wikipedia:Ultramafic"^^<http://www.w3.org/2001/XMLSchema#string> .
_:b1218141	<http://www.w3.org/2002/07/owl#annotatedProperty>	<http://purl.obolibrary.org/obo/IAO_0000115> .