plug dome

The steep-sided, rounded mound formed when viscous lava wells up into a crater and is too stiff to flow away. It piles up as a dome-shaped mass, often completely filling the vent from which it emerged.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

Look at other dictionaries:

  • plug dome —    A volcanic dome characterized by an upheaved, consolidated conduit filling.    GG …   Glossary of landform and geologic terms

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  • salt dome — Geol. a domelike rock structure that is formed beneath the earth s surface by the upward movement of a mass of salt, may reach thousands of feet in vertical extent, and is more or less circular in plan: often associated with oil and gas pools. Cf …   Universalium

  • salt plug — noun : a body of rock salt; specifically : the core of a salt dome * * * salt plug see salt dome above. • • • Main Entry: ↑salt …   Useful english dictionary

  • salt plug — /ˈsɒlt plʌg/ (say solt plug) noun → salt dome …   Australian English dictionary

  • salt dome — /ˈsɒlt doʊm/ (say solt dohm) noun (in sedimentary rocks) a domelike anticline having a core of rock salt which was forced upwards from an underlying bed of salt when in the plastic state under pressure. Also, salt plug …   Australian English dictionary

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  • Geology of the Lassen volcanic area — The geology of the Lassen volcanic area presents a record of sedimentation and volcanic activity in the area in and around Lassen Volcanic National Park in Northern California, U.S.. The park is located in the southernmost part of the Cascade… …   Wikipedia

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