phonolite

All posts tagged phonolite

Heard and McDonald Islands, Australia

Posted by agimarc on 2020-08-02

Posted in: Australia. Tagged: Anzac Peak, Big Ben, effusive, Heard Island, Kerguelen, Mawson Peak, McDonald Island, Mount Dixon, phonolite, thermal, Trachyte. Leave a comment

Emperor penguins on Heard Island. Big Ben volcano is in the background. Image courtesy ABC Australia, Jan. 2019

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The Double Caldera of Mount Suswa, Kenya

Posted by agimarc on 2020-07-01

Posted in: Africa. Tagged: Caldera, East Africa RIft, geothermal, graben, Kenya, Kenya RIft, lava tunnel, Ol Doinyo Nyukie, phonolite, pyroclastics, subsidence, Suswa. 2 Comments

Mount Suswa from the rim of the oldest caldera. Image courtesy African Spice Safaris

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