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- In geology and particularly in sedimentology, a nodule is a small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition from the enclosing sediment or sedimentary rock.
en.wikipedia.org/wiki/Nodule_(geology)
In geology and particularly in sedimentology, a nodule is a small, irregularly rounded knot, mass, or lump of a mineral or mineral aggregate that typically has a contrasting composition from the enclosing sediment or sedimentary rock.
Examples include andic soil properties, episaturation, and identifiable secondary carbonates. A significant number of the terms included in this glossary are words that can be found in a common dictionary, but that have specific unique meanings in the context of soil survey and soil classification.
nodule, rounded mineral concretion that is distinct from, and may be separated from, the formation in which it occurs. Nodules commonly are elongate with a knobby irregular surface; they usually are oriented parallel to the bedding.
- The Editors of Encyclopaedia Britannica
Some other features of soils and sites that may be described are humus form, permafrost, land use, concretions, nodules, calcareousness, salinity, coarse fragments, and reaction. Example of a Pedon Description
colony forming units (cfu): Number of microorganisms that can form colonies when cultured on artifical media using spread plates or pour plates: an indication of the number of viable, culturable microorganisms in a soil or rhizophere sample.
Oct 15, 2018 · Geodes and nodules are two similar but slightly different kinds of rocks. A geode is hollow inside, whereas a nodule rock is solid. Both may contain various substances inside their centers, including crystals, metals or even petroleum. Geodes and nodules can be cut open to reveal their nature.
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Jul 28, 2023 · 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.
