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 volcanic [vɒl'kænik]   添加此单词到默认生词本
a. 火山的, 猛烈的

n. 火山岩




    volcanic
    [ adj ]
    1. relating to or produced by or consisting of volcanoes

      2. <adj.pert>
      volcanic steam
      volcanic islands such as Iceland
      a volcanic cone is a conical mountain or hill built up of material from volcanic eruptions
    2. explosively unstable

      3. <adj.all>
      a volcanic temper
    3. igneous rock produced by eruption and solidified on or near the earth's surface; rhyolite or andesite or basalt

      4. <adj.all>
      volcanic rock includes the volcanic glass obsidian


    Volcanic \Vol*can"ic\, a. [Cf. F. volcanique, It. vulcanico.]
    1. Of or pertaining to a volcano or volcanoes; as, volcanic
    heat.

    2. Produced by a volcano, or, more generally, by igneous
    agencies; as, volcanic tufa.

    3. Changed or affected by the heat of a volcano.

    {Volcanic bomb}, a mass ejected from a volcano, often of
    molten lava having a rounded form.

    {Volcanic cone}, a hill, conical in form, built up of
    cinders, tufa, or lava, during volcanic eruptions.

    {Volcanic foci}, the subterranean centers of volcanic action;
    the points beneath volcanoes where the causes producing
    volcanic phenomena are most active.

    {Volcanic glass}, the vitreous form of lava, produced by
    sudden cooling; obsidian. See {Obsidian}.

    {Volcanic mud}, fetid, sulphurous mud discharged by a
    volcano.

    {Volcanic rocks}, rocks which have been produced from the
    discharges of volcanic matter, as the various kinds of
    basalt, trachyte, scoria, obsidian, etc., whether compact,
    scoriaceous, or vitreous.

    1. In Indonesia, Mrs. Quayle will travel from the capital to learn about coping with volcanic eruptions, and in Singapore, she'll find out about cleaning up oil spills.
    2. The particles can come from such sources as forest fires and volcanic eruptions.
    3. The road now carries travelers on a rugged five-hour journey in the shadow of the Andes' majestic spine, across the barren and cold altiplano and skirting volcanic cones.
    4. The lake has an "incredible and complex volcanic, glacial, and explosive history," he said.
    5. The Copar pumice is the remnant of a volcanic explosion 150,000 years ago and is considered valuable because of its large-sized chunks, its purity and its proximity to the highway.
    6. It is the island's location that presently accounts for the volcanic activity at Kilauea, which has been in continuous eruption since 1983.
    7. Mr. Robbie, who grew up the son of poor Irish and Lebanese immigrants in South Dakota, has a fierce temper and is given to what a former employee calls "the occasional volcanic eruption."
    8. Despite the current activity, the probability of a major earthquake or a volcanic eruption in the area is "less than 1 percent each year," said David Hill, the U.S. Geological Survey geophysicist in charge of research at Long Valley.
    9. To the west, Herculaneum was engulfed by volcanic mud that solidified to form a stone cover 10 metres thick. These provincial coastal towns and cities of the Roman empire were transfixed in the first century.
    10. They estimated concentrations of various gases from past volcanic eruptions and used the results to project annual worldwide totals.
    11. Etna was shaken by tremors during the weekend and the eruption began Monday in a crater near the top of the southeastern slope, said Renato Cristofolini, an expert monitoring the volcanic activity.
    12. Japan, meanwhile, is rife with rumors that the Soviet leader will offer a bold, new solution to the dispute, which concerns ownership of four volcanic islands off the northern tip of Hokkaido.
    13. Experts have also found the Crimean plant to be located almost directly atop an underground dome where high pressures could cause deformation of the earth's surface and eruptions of volcanic mud and gas, the scientists said.
    14. Also visible are a couple of volcanic cinder cones, a 20-mile-wide meteorite crater and long, parallel sets of two- to three-mile-wide valleys and ridges that look like the basins and ranges of Utah and Nevada, Saunders said.
    15. The resulting dust cloud, or perhaps impact-spawned fires, volcanic activity, climatic shifts and other factors, could have killed the giant reptiles directly or choked off their food supply.
    16. The underlying rock is still warm from volcanic activity and the lake rarely ices over in winter.
    17. The smooth floor indicates the crater was flooded by volcanic lava, either during or sometime after the impact, said Steve Saunders, Magellan's chief scientist.
    18. A few months ago, he tried feeding a few crawlers volcanic ash that a fan had sent from Washington's Mount St. Helens, but it didn't seem to have any effect.
    19. Tropical Storm Ted ripped across the Philippines, killing five people, demolishing houses and causing floods, landslides and volcanic mudflows.
    20. Federal officials may not be paying enough attention to the risk of geologic faults and volcanic activity near a proposed Nevada site for a high-level nuclear waste dump, a Nuclear Regulatory Commission member says.
    21. He said the Magellan pictures might answer questions about the extent of volcanic activity and settle disputes over whether Venus once had oceans of water and whether it has shifting crustal plates similiar to those on Earth.
    22. Whether the ozone layer is shrinking is hard to determine because ozone normally fluctuates every year, with sunspots and volcanic eruptions influencing how much is formed.
    23. Ustica's volcanic rocks and caves snare plankton carried by strong, cold Atlantic currents entering the Mediterranean through Gibraltar to the southeast and flow by the island.
    24. The 46-year-old lawyer is often criticized for a volcanic temper, but more damaging are poll findings that nearly half of the city's voters, black and white alike, believe the next mayor should be black.
    25. The Nuclear Regulatory Commission told the department this summer that it should delay sinking the shafts until it understood better the earthquake and volcanic potential of the site.
    26. They also may visit dwellings carved into the soft volcanic ash, or tuff, on the north wall of Frijoles Canyon.
    27. The volcanic islands, famed for their rocky beauty and sub-tropical climate, are about 625 miles southwest of Lisbon and about 435 miles west of the Moroccan coast.
    28. Some researchers still argue the dinosaurs were rendered extinct by gradual, natural climate changes or by climate disruption from huge volcanic eruptions.
    29. Selling pressure resulted from damage caused by volcanic eruptions, a strike for lower petroleum prices and political squabbling, as well as the overvalued peso, which is causing losses on investments by foreigners.
    30. The spaceship's initial pictures showed long faults, other areas crisscrossed by many faults in a pattern resembling broken automobile safety glass, solidified lava flows, volcanic cinder cones, meteorite impact craters and extensive valleys and ridges.
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