Ambre

sopka (bez známé erupce za posledních ~12 000 let), Madagascar, Somalian-Antarctic Volcanic Regions

Kde

Madagascar, Somalian-Antarctic Volcanic Regions

Typ (GVP)

Volcanic field

Nadmořská výška

1 475 m

Poloha

-12,600°, 49,150°

The Massif d'Ambre volcanic field near the northern tip of Madagascar consists of Miocene volcanics capped by more recent cones. The earliest volcanism produced a large basaltic massif and minor pyroclastic flows. The rocks span a wide geochemical spectrum, including basaltic, andesitic, rhyolitic, trachytic, phonolitic, and foiditic compositions. Some features were mapped as Recent by Besairie (1973) based on morphology. Other relatively younger cones are located at the S end of the massif, where Rusquet et al. (2024) indicated an age range of 2-0.8 Ma, and a tabulation of radiometric dates by Cucciniello et al. (2016) listed the youngest as 830 +/- 20 ka (citing Emerick and Duncan, 1982 and 1983).

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.