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lava    音标拼音: [l'ɑvə]
n. 熔岩,火山岩

熔岩,火山岩

lava
n 1: rock that in its molten form (as magma) issues from
volcanos; lava is what magma is called when it reaches the
surface

Lava \La"va\ (l[aum]"v[.a]; 277), n. [It. lava lava, orig. in
Naples, a torrent of rain overflowing the streets, fr. It. &
L. lavare to wash. See {Lave}.]
The melted rock ejected by a volcano from its top or fissured
sides. It flows out in streams sometimes miles in length. It
also issues from fissures in the earth's surface, and forms
beds covering many square miles, as in the Northwestern
United States.
[1913 Webster]

Note: Lavas are classed, according to their structure, as
scoriaceous or cellular, glassy, stony, etc., and
according to the material of which they consist, as
doleritic, trachytic, etc.
[1913 Webster]

{Lava millstone}, a hard and coarse basaltic millstone from
the neighborhood of the Rhine.

{Lava ware}, a kind of cheap pottery made of iron slag cast
into tiles, urns, table tops, etc., resembling lava in
appearance.
[1913 Webster]

60 Moby Thesaurus words for "lava":
aa, abyssal rock, ash, ashes, basalt, bedrock, block lava, brand,
brash, breccia, calx, carbon, charcoal, cinder, clinker, coal,
coke, conglomerate, coom, crag, dross, druid stone,
festooned pahoehoe, fume, gneiss, granite, igneous rock, limestone,
living rock, magma, mantlerock, metamorphic rock, monolith,
pahoehoe, pillow lava, porphyry, pudding stone, reek, regolith,
rock, ropy lava, rubble, rubblestone, sandstone, sarsen, schist,
scoria, scree, sedimentary rock, shelly pahoehoe, slag, smoke,
smudge, smut, soot, stone, sullage, talus, tufa, tuff


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  • Lava | Types, Composition, Temperature, Facts | Britannica
    Lava, magma (molten rock) emerging as a liquid onto Earth’s surface The term ‘lava’ is also used for the solidified rock formed by the cooling of a molten lava flow
  • Lava - Wikipedia
    Lava is magma that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from 800 to 1,200 °C (1,470 to 2,190 °F)
  • Lava Flows - U. S. National Park Service
    Red-hot lava oozing from a volcanic vent during an eruption and slowly, but unstoppably, spreading across the landscape is one of the most awe-inspiring natural phenomena on our active Earth
  • Magma vs Lava: Key Differences, Formation Process and Volcanic Behavior
    Magma stays underground under high pressure, while lava reaches the surface and cools quickly Learn how their gas content and cooling rates create different rocks
  • What is Lava? | Volcano Glossary | Perlan
    Learn about lava, the molten rock that erupts from volcanoes and its types, formation process, and the transformative impact it has on Earth's surface and ecosystems
  • Lava Science | Ask An Expert
    Studying the lava flows on Earth with surfaces similar to lava on other planets and moons can help scientists understand their volcanic history and the processes under the ground surface
  • LAVA Definition Meaning - Merriam-Webster
    The meaning of LAVA is molten rock that issues from a volcano or from a fissure in the surface of a planet (such as earth) or moon; also : such rock that has cooled and hardened
  • Lava flows destroy everything in their path - USGS. gov
    Lava flows are streams of molten rock that pour or ooze from an erupting vent Lava is erupted during either nonexplosive activity or explosive lava fountains
  • Lava - New World Encyclopedia
    Lava is molten rock expelled by a volcano during an eruption (When the molten rock is beneath the Earth 's surface, it is called magma ) When first exuded from a volcanic vent, the hot lava is at temperatures ranging from 700 °C to 1,200 °C (1,300 °F to 2,200 °F)
  • What is lava made of? | Volcano World | Oregon State University
    Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases) As magma gets closer to the surface and cools, it begins to crystallize minerals like olivine and form bubbles of volcanic gases





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