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File:Pahoehoe basalt lava flow surface (Mauna Iki Crater, Kilauea Volcano, Hawaii, USA) (14838874818).jpg

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Pahoehoe lava from the upper Holocene of Hawaii. (CMNH 12388, Cleveland Museum of Natural History, Cleveland, Ohio, USA)

Mt. Kilauea is the world’s most active volcano. It sits atop the Hawaii Hotspot in the central Pacific Ocean. It had a decades-long eruption from 1983 to 2018. Kilauea lavas are basaltic in composition, but the physical appearance of Kilauea’s output varies tremendously. Many of Kilauea’s ongoing basaltic eruptions have occurred along its East Rift Zone, a fracture system extending ~eastward from the summit vent area.

Basalt lava flows in Hawaii have two types of surface morphologies: 1) aa lava and 2) pahoehoe lava. The Hawaiian names for these lava flow surfaces have become technical names in volcanology. Pahoehoe lava (pronounced “pa-hoy-hoy”) has a smooth or ropy top surface - the rock shown here is an example. Pahoehoe surface morphologies are not restricted to lava flows at the Hawaii Hotspot. It’s commonly seen in many basaltic lava fields on Earth.

Locality: Mauna Iki Crater, Kilauea Volcano, Hawaii Hotspot, central Pacific Basin
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Source Pahoehoe basalt lava flow surface (Mauna Iki Crater, Kilauea Volcano, Hawaii, USA)
Author James St. John

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14838874818 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

10 October 2019

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Date/TimeThumbnailDimensionsUserComment
current00:15, 10 October 2019Thumbnail for version as of 00:15, 10 October 20192,311 × 1,998 (2.03 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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