Earth:Pisolite
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Short description: Sedimantary rock made of large grains, usually of calcium carbonate
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QEMSCAN mineral map of pisoids
A pisolite (from grc 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.
See also
References
Further reading
- Manutchehr-Danai, Mohsen (2009). Dictionary of gems and gemology (3rd ed.). Springer. ISBN 978-3-540-72795-8.
![]() | Original source: https://en.wikipedia.org/wiki/Pisolite.
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