GeezerVison

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.

• Ooid
• Oolite

• Manutchehr-Danai, Mohsen (2009). Dictionary of gems and gemology (3rd ed.). Springer. ISBN 978-3-540-72795-8.

This sedimentary rock-related article is a stub. You can help Wikipedia by adding missing information.

• v
• t
• e