Concept information
Preferred term

Created: 2019-09-04T12:02:37
Last modified: 2022-01-19T11:18:24
Definition
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In sedimentology and geology, a nodule is a small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition, such as a pyrite nodule in coal, a chert nodule in limestone, or a phosphorite nodule in marine shale, from the enclosing sediment or sedimentary rock. (en)
Broader concept
- chemical sediments (en)
Narrower concepts
- ferromanganese nodules (en)
- phosphorite nodules (en)
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