Nephrolepis brownii fern in hardened lava

Nephrolepis brownii fern in hardened lava

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Credit: MICHAEL SZOENYI/SCIENCE PHOTO LIBRARY

Caption: Nephrolepis brownii fern in hardened lava. Close-up of the fronds of a Nephrolepis brownii fern growing within cooled and hardened pahoehoe lava. This thick ropey-looking lava can flow at speeds of up to 50 kilometres per hour. It may harden in smooth sheets or ooze out and solidify into twisted rope-like formations (seen here). Pahoehoe lava is a type of basic lava with a low silica content, giving it a low melting point. This means the lava can travel great distances from the crater or vent from which it issued. Photographed on Big Island, Hawaii, USA.

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Keywords: american, asian sword fern, big island, biological, biology, botanical, botany, close-up, cool, cooled, detail, earth science, environment, environmental science, fern, flora, formation, frond, fronds, geographical, geography, geological, geology, hard, hardened, hawaii, hawaiian, hawaiian islands, kilauea, lava, lava flow, nature, nephrolepis brownii, no-one, nobody, north america, pahoehoe lava, rock, rocks, rocky, shield volcano, solidified, united states, us, usa, volcanic, volcano, volcanological, volcanology, vulcanological, vulcanology, wild, wildlife

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