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laccolith
[ lak-uh-lith ]
noun
Geology.
- a mass of igneous rock formed from magma that did not find its way to the surface but spread laterally into a lenticular body, forcing overlying strata to bulge upward.
laccolith
/ ˈlækəlɪθ; ˈlækəˌlaɪt; ˌlækəˈlɪtɪk /
noun
- a dome-shaped body of igneous rock between two layers of older sedimentary rock: formed by the intrusion of magma, forcing the overlying strata into the shape of a dome See lopolith
laccolith
/ ă′ə-ĭٳ′ /
- A body of igneous rock intruded between layers of sedimentary rock, resulting in uplift. Laccoliths are usually plano-convex in cross-section, having a flat bottom and a convex top, and are roughly circular in plan. They are usually connected to a dike and are typically up to 8 km (5 mi) in diameter and tens to hundreds of meters thick.
- See illustration at batholith
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Derived Forms
- ˌˈٳ, adjective
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Other yvlogs From
- c·ٳi ··· [lak-, uh, -, lit, -ik], adjective
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yvlog History and Origins
Origin of laccolith1
1875–80; < Greek á ( s ) pond + -lith
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yvlog History and Origins
Origin of laccolith1
C19: from Greek lakkos cistern + -lith
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Example Sentences
Rising above them all is Lone Peak, a geologic marvel known as a Christmas tree laccolith for its pyramidal shape.
From
Geologists decided that it was caused by a "laccolith," a mass of molten material that had forced its way toward the surface, raising local rock strata instead of breaking through them.
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