Ankaramite is volcanic rock type of mafic composition.
It is a dark porphyritic variety of basanite containing abundant pyroxene and olivine phenocrysts.
[1] It contains minor amounts of plagioclase and accessory biotite, apatite, and iron oxides.
[1] It is also found in the Sierra de Guanajuato of Central Mexico,[1] the South Pacific on islands such as Tahiti, Rarotonga, Samoa and in the Zealandia, Alexandra Volcanic Group.
You can help Wikipedia by expanding it.This geochemistry article is a stub.