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 …

The shape of an ironstone concretion often depends on the way a shale or sandstone bed breaks up into regular blocks of various sizes under the action of weathering. This separation takes …

Apr 3, 2020 · The size of the concretion may be related to the permeability of the rock in which it occurs: the more permeable the surrounding rock, the larger the concretion. Below we …

High minus-cement porosities, in the range of 70–90%, in the inner shells of many concretions attest to the early diagenetic initiation of concretion growth. The carbonate content of …

Jan 16, 2020 · A concretion is a hard mass that forms when rock minerals precipitate in cracks or cavities, or through the build-up of sediment. These mineral masses are common in types of …

Apr 7, 2023 · 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 …

‘Early diagenetic’ concretion in Carboniferous mudstones, Newgale, Pembrokeshire. The iron-rich concretion has formed prior to significant compaction so that the enhanced compaction of the …

Jun 8, 2018 · concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock [1]. It is formed by the accumulation of mineral …

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" 3. an increase in the density of something; 4. the …

concretion，英语单词，主要用作名词，作名词时译为“结石；凝固；凝固物”。