Emuruangogolak

sopka – Shield, Kenya, Eastern Africa Volcanic Regions

Kde

Kenya, Eastern Africa Volcanic Regions

Typ (GVP)

Shield

Nadmořská výška

1 285 m

Tektonické prostředí

Rift zone / Continental crust (> 25 km)

Poslední známá erupce

1910

Poloha

1,500°, 36,330°

The broad Emuruangogolak shield volcano is situated at a narrow constriction in the Gregory Rift and almost completely straddles it. A 5 x 3.5 km summit caldera formed about 38,000 years ago. Since then trachytic and basaltic lava flows were erupted on the northern and southern flanks and within the caldera. A NNE-SSW-trending chain of lake-filled basaltic maars extends along the floor of the rift from the lower flanks of the volcano. Young lava flows were also erupted from vents along rift valley faults. Well-preserved cones erupted along rift-parallel faults cutting the volcano; the latest eruption produced a trachytic lava flow dated from secular magnetic variation measurements at about the beginning of the 20th century. Fumarolic activity and hot steaming ground occurs along NNE-trending fissures within the caldera and along the lower NW flanks.

Text: Smithsonian Global Volcanism Program.

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