basanite
/ˈbasənʌɪt
/noun [mass noun]
A dark grey or black basaltic rock consisting of plagioclase, augite, olivine, and a feldspathoid.In 1949, both basanite and tephrite were ejected during a single, 5 week long eruption that formed monogenetic cones and lava flows on the volcanic island of La Palma, Canary Islands....
- Eruption at the surface then yields initial tephrite, typically erupted as pyroclasts, followed by eruption and shallow intrusion of basanite from deeper in the dyke.
- In most cases the basanites intrude Triassic cherts and carbonates.
Origin
Late 18th century: from Latin basanites (see basalt) + -ite1.