| concretion |
the formation of stonelike objects within a body organ (e.g., the kidneys) calculus: a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body; "renal calculi can be very painful" compaction: an increase in the density of something coalescence: the union of diverse things into one body or form or group; the growing together of parts
출처: wordnet.princeton.edu/perl/webwn
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| concretion |
A concretion is a compact rock mass usually spherical or disk-shaped and embedded in a host rock of a different composition. Concretions form by precipitation of mineral matter (commonly a carbonate mineral such as calcite, but sometimes an iron oxide or hydroxide such as goethite or sometimes an amorphous or microcrystalline form of silica) about a nucleus such as a piece of shell or bone.
출처: www.msnucleus.org/membership/html/jh/earth/diction...
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| concretion |
A spherical or ellipsoidal nodule formed by accumulation of mineral matter after deposition of sediment.
출처: imnh.isu.edu/digitalatlas/glossary/letter.asp
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| concretion |
a natural clay nodule formed out of solution in soil interstices. Often confused for man-made objects because of their peculiar shapes.
출처: farahsouth.cgu.edu/dictionary/
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| concretion |
A nodular concentration of mineral matter that, during weathering of the enclosing sedimentary rock, commonly is more resistant and freed as more-or-less rounded rocks. See Neuropteris, a Pennsylvanian plant, and Orbiculoidea, an inarticulate brachiopod.
출처: www.kgs.ku.edu/Publications/ancient/vocab.html
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