Basanite
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Basanite is an igneous, volcanic rock with aphanitic to porphyritic texture. It is composed mostly of feldspathoids, pyroxenes, olivine, and calcic plagioclase and forms from magma low in silica and e
Volcanic bomb of black basanite enclosing a xenolith of green dunite from Réunion
QAPF diagram showing the basanite/tephrite field in yellow
Basanite sculpture of Livia Drusilla
Tephrite
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Tephrite is an igneous, volcanic rock, with aphanitic to porphyritic texture. Mineral content is usually abundant feldspathoids, plagioclase, and lesser alkali feldspar. Pyroxenes are common accessory
Basanite
…between 10% and 60% by volume is feldspathoid and over 90% of the feldspar is plagioclase. Quartz is never present. This places basanite in the basanite/tephrite field of the QAPF diagram. Basanite is further distinguished from tephrite by having a normative olivine content greater than 10%. While the IUGS…
An example of Tephrite found on the crater of Mount Vesuvius
Leucite tephrite from Mayen, Eifel, Germany