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Concretion. A concretion is a hard, 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.
Nov 1, 1996 · EARTH-SCIENCE REVIEWS ELSEVIER Earth-Science Reviews 41 (1996) 177-210 Concretion morphology, classification and genesis J. Sellés-Martínez Dep. Ciencias Geologicas, Fac. Ciencias Exactas, Universidad de Buenos Aires, Pa6ellon 2 Ciudad Universitaria, 1428 Buenos Aires, Argentina Received 10 October 1995; accepted 17 April 1996 Abstract A ...
- J. Sellés-Martínez
- 1996
Aug 15, 2001 · Reflecting the state of the sediment in subsequent stages of diagenesis and epigenesis, they deserve a study and systematization in their own right. At the same time, concretional morphologies illustrate the effect of hierarchic self-organization, which is a basic element also in biological evolution. 1. Introduction.
- Adolf Seilacher
- 2001
Jun 8, 2018 · concretion. 1. Roughly spherical or ellipsoidal body, produced as a result of local early cementation within a sediment. It is often found with a fossil as a ‘nucleus’. The size ranges from approximately 1mm to more than 1 m, and concretions are generally monomineralic. 2.
Concretions. A concretion is a hard, compact mass of matter formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil. Concretions are often ovoid or spherical in shape, although irregular shapes also occur. The word 'concretion' is derived from the Latin concretio " (act of ...
Sep 29, 2023 · Various concretion types and their formation modes are described, as well as the variety of methodologies employed in their characterization. The review also includes examples of organic geochemical (biomarker) and isotopic studies and the enormous potential for the molecular record to reveal insights about extinct organisms.
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In subject area: Physics and Astronomy. Concretions are mineral precipitates that form in the pore spaces of sediment during burial. They can occur as pervasive cement or discrete patches around nuclei, such as fossils or root traces. Some concretions, formed at shallow burial depths, help preserve delicate fossils by resisting compaction.
