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concretion    
n. 凝固,凝固物,结石

凝固,凝固物,结石

concretion
n 1: the formation of stonelike objects within a body organ
(e.g., the kidneys)
2: 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" [synonym: {calculus}, {concretion}]
3: an increase in the density of something [synonym: {compaction},
{compression}, {concretion}, {densification}]
4: the union of diverse things into one body or form or group;
the growing together of parts [synonym: {coalescence},
{coalescency}, {coalition}, {concretion}, {conglutination}]


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  • Concretion - Wikipedia
    A concretion is a hard and compact mass formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil [1] Concretions are often ovoid or spherical in shape, although irregular shapes also occur
  • Concretions: What Are These Bizarre Rock Formations? (And Whats Inside . . .
    What is a Concretion? A concretion is a hard mass found within layers of sedimentary stone They’re generally round in shape, and each type tends towards one form or another You shouldn’t confuse a concretion with a nodule
  • Concretions, Thunder Eggs and Geodes - The Australian Museum
    Concretions can have regular shapes like blocks, boxes, pipes, flat discs, canon balls, or even resemble parts of a human body such as a foot or rib It is sometimes hard to believe that they formed by natural processes Ironstone concretions are common around Sydney, with its outcrops of iron-rich shale and sandstone
  • What Is A Concretion? - WorldAtlas
    Often mistaken for bones, turtle shells, or fossil eggs, concretions are geological features found in sedimentary rock and soil A concretion is a hard mass that forms when rock minerals precipitate in cracks or cavities, or through the build-up of sediment
  • Concretions - Paleontological Research Institution
    Concretions are commonly misunderstood geologic structures Often mistaken for fossil eggs, turtle shells, or bones, they are actually not fossils at all but a common geologic phenomenon in almost all types of sedimentary rock, including sandstones, shales, siltstones, and limestones
  • Scientists Have Cracked The Mystery Of How Fossil Concretions Form - Forbes
    Concretions, despite being common in sedimentary rocks, are still a sort of geological mystery Do dead animals or plants play a role in the formation of concretions, or do concretions simply
  • CONCRETION Definition Meaning - Merriam-Webster
    The meaning of CONCRETION is something concreted How to use concretion in a sentence
  • Concretions Picture Gallery - ThoughtCo
    Concretions are hard bodies that form in sediments before they become sedimentary rocks Slow chemical changes, perhaps related to microbial activity, cause minerals to come out of the groundwater and seal the sediment together Most often the cementing mineral is calcite, but the brown, iron-bearing carbonate mineral siderite is also common
  • Carbonate concretions—explained - Dorset Geologists Association
    In this article we explain how and where concretions form and discuss the evidence, ranging from outcrop data to sophisticated laboratory analyses, which can be used to determine their origins The roles of microbes, decaying carcasses, compaction and groundwaters are highlighted
  • Concretion - GeoKansas
    Concretions are masses of mineral matter embedded within rock layers, including limestone, sandstone, and shale They often take shape when minerals precipitating (settling) out of water collect around a nucleus, such as a pebble, leaf, shell, bone, or fossil





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