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ankaramite
Ankaramite is volcanic rock type of mafic composition. It is a dark porphyritic variety of basanite containing abundant pyroxene and olivine phenocrysts.〔http://rmcg.unam.mx/17-1/(3)Ortiz.pdf Luis Enrique Ortiz Hernández, ''An Arc Ankaramite Occurrence in Central Mexico,'' Revista Mexicana de Ciencias Geológicas, volumen 17, número 1 2000, p. 34-44〕 It contains minor amounts of plagioclase and accessory biotite, apatite, and iron oxides. Its type locality is Ankaramy in Madagascar. It was first described in 1916.〔 ==References==
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