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Glossary of Geology Terms
beginning with letter L
Browse the Geology Glossary
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lacustrine Tweet Definition of lacustrine Like Definition of lacustrine on Facebook
adjective
  1. of or relating to lakes
lahar Tweet Definition of lahar Like Definition of lahar on Facebook
noun
  1. A volcanic mudflow
lamina Tweet Definition of lamina Like Definition of lamina on Facebook
noun (pl1=laminaspl2=laminae)
  1. (anatomy) A thin plate or scale, such as the arch of a vertebra.
  2. (botany) The flat part of a leaf or leaflet; the blade.
landform Tweet Definition of landform Like Definition of landform on Facebook
noun
  1. Any geological feature such as a mountain or valley
landmass Tweet Definition of landmass Like Definition of landmass on Facebook
noun (landmasses)
  1. A large continuous area of land, either surrounded by sea or contiguous with another landmass.
landslide Tweet Definition of landslide Like Definition of landslide on Facebook
noun
  1. A natural disaster that involves the breakup and downhill flow of rock, mud, water and anything caught in the path.
  2. A vote won by a wide or overwhelming majority.
The candidate won by a .
adjective
  1. Of an election or vote, won by a large majority.
laterite Tweet Definition of laterite Like Definition of laterite on Facebook
noun
  1. A red hard or gravel-like soil or subsoil formed in the tropics that has been leached of soluble minerals leaving insoluble iron and aluminium oxides and hydroxides; used to make bricks and roads.
Laurasia Tweet Definition of Laurasia Like Definition of Laurasia on Facebook
noun
  1. supercontinent including most of the landmasses which make up today's continents of the northern hemisphere
Laurentian Tweet Definition of Laurentian Like Definition of Laurentian on Facebook
noun
  1. An extinct Iroquoian language of Canada.
  2. (context, geology) The Laurentian period.
adjective
  1. Pertaining to, or near, the w:Saint Lawrence River, Saint Lawrence River.
In the hills.
lava Tweet Definition of lava Like Definition of lava on Facebook
noun
  1. The melted rock ejected by a volcano from its crater or fissured sides.<!--encyclopedic info: It flows out in streams sometimes miles or kilometres 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.
Note: Lavas are classed, according to their 1) structure, as scoriaceous or cellular, glassy, stony, etc., 2) according to the material of which they consist, as doleritic, trachytic, etc., and 3) according to their form in flows as either aa or pahoehoe.-->
  1. magma
lens Tweet Definition of lens Like Definition of lens on Facebook
noun (plurallenses)
  1. An object, usually made of glass, that focuses or defocuses the light that passes through it.
  2. A device which focuses or defocuses electron beams.
  3. (geometry) A shape comprising two circular arcs, joined at their endpoints.
  4. (biology) A genus of the legume family.
  5. (anatomy) The transparent crystalline structure in the eye.
levee Tweet Definition of levee Like Definition of levee on Facebook
noun
  1. An embankment to prevent inundation; as, the levees along the Mississippi.
  2. The steep bank of a river, or border of an irrigated field.
  3. A pier or other landing place on a river.
  4. A formal reception, especially one given by royalty (originally, upon rising from bed).
lithophile Tweet Definition of lithophile Like Definition of lithophile on Facebook
noun
  1. (chemistry), (geology) in the Goldschmidt classification, an element that forms silicates or oxides and is concentrated in the minerals of the Earth's crust
lithosphere Tweet Definition of lithosphere Like Definition of lithosphere on Facebook
noun
  1. (geology) The rigid, mechanically strong, outer layer of the Earth; divided into twelve major plates
loess Tweet Definition of loess Like Definition of loess on Facebook
noun
  1. (geology) any sediment, dominated by silt, of eolian (wind-blown) origin

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