oolith


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oolith

[′ō·ə‚lith]
(petrology)
A small (0.25-2.0 millimeters), rounded accretionary body in a sedimentary rock; generally formed of calcium carbonate by inorganic precipitation or by replacement; ooliths generally exhibit concentric or radial internal structure.
References in periodicals archive ?
The iron-ooid interval in Aguilon includes several limestone bands with abundant, small-size, well-sorted ooliths.
formed by yellow-reddish iron ooid wackestone to packstone, including abundant, thick highly heterometric ferruginous ooliths.
In outcrop Ca1-b, between Calanda and Mas de las Matas, the iron-ooid bed forms a 20 cm thick interval of a grey-reddish wackestone to packstone of iron ooliths and bioclasts.