Scoriaceous basalt (May-August 2018, Lower Puna Eruption of Kilauea Volcano, Hawaii) 3 : 無料・フリー素材/写真
Scoriaceous basalt (May-August 2018, Lower Puna Eruption of Kilauea Volcano, Hawaii) 3 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Scoriaceous basalt from the Holocene of Hawaii, 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, with intermittent, low-intensity eruptions since then. Kilauea lavas are basaltic in composition, but the physical appearance of Kilauea’s output varies. Many of Kilauea’s ongoing basaltic eruptions have occurred along its East Rift Zone, a fracture system extending ~eastward from the summit vent area.This specimen is scoriaceous basalt from a 2018 lava flow. Scoriaceous basalt is a mafic, frothy-textured, light-weight, extrusive igneous rock. It forms by cooling of basalt lava that is rich in dissolved gases. The upper surface (seen here) is vesiculated glass (= tachylite).Stratigraphy: lava flow from the Lower Puna Eruption of May to August 2018, HoloceneLocality: edge of an aa flow channel near the Puna geothermal power plant & near the town of Kapoho, southeastern Hawaii, USA |
| 撮影日 | 2023-10-11 15:46:59 |
| 撮影者 | James St. John |
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