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Our
Beautiful World
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 Bilde fra USGS |
Blokker Blokker er stein, større
enn 64 mm i diameter, |
 Blocks Tephra is the general term now used by volcanologists
for
airborne volcanic ejecta of any size. Historically, however, various terms have been used to describe ejecta of different sizes. ... Fragments larger than about 2.5 inches are called blocks if they were ejected in a solid state and volcanic bombs if ejected in semi-solid, or plastic, condition. Fragments of lava or rock larger than 64 millimeters in size that are blasted into the air by volcanic explosions. See: Tephra. Picture on right side: Block moved 55 km to Java during Krakatau-eruption in 1883. |
Korallblokk som ble revet løs fra strandkanten ved Krakatau-vulkanens store eksplosjon i 1883. Blokken ble kastet 55 km over på på Java-øya. Den er 300 m³ stor, og veier rundt 600 tonn..... Foto og tekst dette bilde: Photo and text this picture: Kimberly, P., Siebert, L., Luhr, J.F., and Simkin, T. (1998). Volcanoes of Indonesia, v. 1.0 (CD-ROM). Smithsonian Institution, Global Volcanism Program, Digital Information Series, GVP-1. |
 ANIMALS over 250 |
 BIRDS over 500 |
 FLOWERS over 225 |
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