Sedimentary rock made of large grains, usually of calcium carbonate
Pisoids in the Conococheague limestone (Upper Cambrian) of eastern PennsylvaniaPisolitic limestone; Itaboraí, Rio de Janeiro, Brazil; pisolith diameters average 1.0 cmQEMSCAN mineral map of bauxite forming pisoids
A pisolite (from Ancient Greek πίσον (píson) 'pea') is a sedimentary rock made of pisoids, which are concretionary grains – typically of calcium carbonate which resemble ooids, but are more than 2 mm in diameter.[1] These grains are approximately spherical and have concentric layers reaching 10 mm in diameter.
Bauxites, limonites, and siderites often have a pisolitic structure.
A pisolite (from Ancient Greek πίσον (píson) 'pea') is a sedimentary rock made of pisoids, which are concretionary grains – typically of calcium carbonate...
phosphorus, water content (especially pisolite sedimentary accumulations), and aluminium (clays within pisolites). Export-grade DSO ores are generally...
25–2 millimetres; rocks composed of ooids larger than 2 mm are called pisolites. The term oolith can refer to oolite or individual ooids. Ooids are most...
uppermost part of the laterite cover. In some places laterites contain pisolites and ferricrete, and they may be found in elevated positions as result...
that rise above this pediplain contain laterite soils, sometimes with pisolites or ferricrete, and are remnants of an older surface. Some of the summits...
finds, traces of human habitation, stalactites and stalagmites, as well as pisolite rocks, the river Miljacka wellspring, all makes this cave among most valuable...
and mosaic dolomite. The next is oolitic of mosaic dolomite with oolite, pisolite, and grapestone. The lowest layer is upper cherty stromatolites that has...
finds, traces of human habitation, stalactites and stalagmites, as well as pisolite rocks, the river Miljacka wellspring, all makes this cave among most valuable...
that rise above this pediplain contain laterite soils, sometimes with pisolites or ferricrete, and are remnants of an older surface. Some of the summits...
Warm Springs Canyon is cut by shorelines of Lake Manly. Chevrons and pisolites have been found in lake sediments. A number of alluvial fans decorate...
diameter 0.25–2 mm. Rocks composed of ooids larger than 2 mm are called pisolites. They frequently contain minute fragments of shell or rock, and sometimes...
are placer deposits, formed by accumulation of hematite gravels called pisolites which form channel-iron deposits. These are preferred because they are...
metric, sequence. Aganane Formation, High Atlas. Vadose ferrugenous pisolites (soil) and coastal (tempestite) sediment with birdseyes in an outer platform...
the formation are hematitic shales with numerous 1 to 5 mm oolites or pisolites. The upper part of the formation is an upward coarsening sequence of crossbedded...
plane bedding and preserved cross laminations, algal mats, stromatolites, pisolites, intraclasts, and mud-cracks, indicating a shallow water depositional...
the aluminum hydroxides in bauxite form small oolites and pea-sized pisolites and outcrop or are located very close to the surface under thin sediments...
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