volcanic dome

   A steep-sided, rounded extrusion of highly viscous lava squeezed out from a volcano, and forming a dome-shaped or bulbous mass of congealed lava above and around the volcanic vent.

Glossary of landform and geologic terms. 2013.

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  • volcanic dome — USGS PHOTO GLOSSARY OF VOLCANIC TERMS Volcanic domes are rounded, steep sided mounds built by very viscous magma, usually either dacite or rhyolite. Such magmas are typically too viscous (resistant to flow) to move far from the vent before… …   Glossary of volcanic terms

  • volcanic dome — ▪ geology also called  Lava Dome,   any steep sided mound that is formed when lava reaching the Earth s surface is so viscous that it cannot flow away readily and accumulates around the vent. Sometimes domes are produced by repeated outpourings… …   Universalium

  • volcanic dome — noun see dome I …   Useful english dictionary

  • Dome (disambiguation) — Dome in architecture : ribbed hemispherical dome resting on an octagonal drum in the Great Mosque of Kairouan (also called the Mosque of Uqba), city of Kairouan, Tunisia. A dome is a structural element of architecture that resembles the… …   Wikipedia

  • Dome Mountain — Elevation 2,031 m (6,663 ft) Prominence 136 m (446 ft) …   Wikipedia

  • dome´like´ — dome «dohm», noun, verb, domed, dom|ing. –n. 1. a large, rounded roof or ceiling on a circular or many sided base; cupola: »Nearly every state capitol has a dome. 2. anything shaped like a dome; something high and rounded: »the dome of the sky,… …   Useful english dictionary

  • Volcanic blocks — are fragments of rock which measure more than 64mm in size and are erupted in a solid condition. Blocks are formed from material from previous eruptions or from country rock and are therefore mostly accessory or accidental in origin. Blocks also… …   Wikipedia

  • dome — ALASKA VOLCANO OBSERVATORY GLOSSARY A steep sided mass of viscous (doughy) lava extruded from a volcanic vent (often circular in plane view) and spiny, rounded, or flat on top. Its surface is often rough and blocky as a result of fragmentation of …   Glossary of volcanic terms

  • DOME —    The dome, which is created from an arch turned on its axis 360 degrees, is traditionally considered one of the most important Ancient Roman architectural inventions. Although round temples were not new to Ancient Rome, the Pantheon, when it… …   Historical Dictionary of Architecture

  • dome fountain — USGS PHOTO GLOSSARY OF VOLCANIC TERMS Dome fountains are hemispherically shaped lava fountains that form when the upward pressure of magma from the conduit below is in approximate equilibrium with the mass of ponded lava through which it passes.… …   Glossary of volcanic terms

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