Igneous rock | |
Composition | |
---|---|
Mafic: pyroxene, olivine and plagioclase. |
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.
Its type locality is Ankaramy in Madagascar. It was first described in 1916. [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. [2]
Igneous rock | |
Composition | |
---|---|
Mafic: pyroxene, olivine and plagioclase. |
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.
Its type locality is Ankaramy in Madagascar. It was first described in 1916. [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. [2]