lahar deposit


lahar deposit
   Unconsolidated volcaniclastic material emplaced as mudflows on or near the flanks of a volcano.
   SW

Glossary of landform and geologic terms. 2013.

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  • andesitic lahar deposit —    A lahar dominated by andesitic volcaniclastics.    SW …   Glossary of landform and geologic terms

  • lahar —    The landform and sediments (i.e., lahar deposit) emplaced by, and the process associated with, a mudflow composed mainly of volcaniclastic debris on or near the flank of a volcano. Sediment composition includes pyroclastic material, primary… …   Glossary of landform and geologic terms

  • lahar — /lah hahr/, n. Geol. 1. a landslide of wet volcanic debris on the side of a volcano. 2. the deposit left by such a landslide. [1925 30; < Javanese: lahar, lava] * * * ▪ volcanic mudflow  mudflow of volcanic material. Lahars may carry all sizes of …   Universalium

  • lahar — [lä′här΄, lä här′] n. 1. a mudflow down the side of a volcano, containing pieces of hardened lava, ash, etc. 2. the deposit of such a mudflow …   English World dictionary

  • cohesive lahar — ALASKA VOLCANO OBSERVATORY GLOSSARY A type of volcanic debris flow that contains more than 3 5 percent clay in the deposit matrix. Such lahars are thought to form from volcanic debris avalanches. Cohesive lahars are very mobile and may flow long… …   Glossary of volcanic terms

  • noncohesive lahar — ALASKA VOLCANO OBSERVATORY GLOSSARY A type of volcanic debris flow that contains less than 3 5 percent clay in the deposit matrix. Such lahars form when meltwater produced by the interaction of pyroclastic flows and snow or ice picks up locally… …   Glossary of volcanic terms

  • volcaniclastic —    (adjective)    Pertaining to the entire spectrum of fragmental materials with a preponderance of clasts of volcanic origin. The term includes not only pyroclastic materials but also epiclastic deposits derived from volcanic source areas by… …   Glossary of landform and geologic terms

  • Debris flow — Scars formed by debris flow in great Los Angeles during the winter of 1968 1969. The photograph was taken within several months of the debris flows occurring. A debris flow is a fast moving, liquefied landslide of unconsolidated, saturated debris …   Wikipedia

  • Prediction of volcanic activity — (also: volcanic eruption forecasting ) is an interdisciplinary scientific and engineering approach to natural catastrophic event forecasting. Volcanic activity prediction has not been perfected, but significant progress has been made in recent… …   Wikipedia

  • Galunggung — Lightning strikes during the 1982 eruption of Galunggung Elevation 2,168 m (7,113 ft) …   Wikipedia