File:Olivine-basalt sand (marine beach sand, modern; Green Sand Beach, Puu Mahana Volcanic Cone, southern tip of Hawaii, central Pacific Ocean) 1 (14849942188).jpg

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Olivine-basalt sand, Green Sand Beach, Puu Mahana Volcanic Cone, Hawaii Hotspot, central Pacific Basin. Most sand grains here are ~1 to 1.5 millimeters in size.

Weathering & erosion of rocks at the Puu Mahana Volcanic Cone (tuff ring) has resulted in a concentration of olivine crystals at a beach near the southermost tip of the island of Hawaii. This is modern marine beach sand from Green Sand Beach. This is one of only two greenish, olivine-rich beaches in the world. The green material is olivine sand ((Mg,Fe)2SiO4). The dark gray material is basalt lithic sand. The white material is biogenic aragonite sand (shell fragments).
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Source Olivine-basalt sand (marine beach sand, modern; Green Sand Beach, Puu Mahana Volcanic Cone, southern tip of Hawaii, central Pacific Ocean) 1
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@N05/14849942188 (archive). It was reviewed on 7 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

7 December 2019

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Date/TimeThumbnailDimensionsUserComment
current17:54, 7 December 2019Thumbnail for version as of 17:54, 7 December 20193,008 × 2,000 (6.88 MB)Ser Amantio di Nicolao (talk | contribs)Transferred from Flickr via #flickr2commons

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