Concept
Alternate Profiles
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- Preferred Labelskos:prefLabel
oncoid
- URI
- http://resource.geosciml.org/classifier/cgi/particletype/oncoid ↗Go to the persistent identifier link
- Within Vocab
- Particle Type
| Preferred Labelskos:prefLabel | oncoid |
|---|---|
| Definitionskos:definition | A '...coated grain with a cortex of irregular, partially overlapping laminae. They are typically irregular in shape and may exhibit biogenic structures. Some forms lack a distinct nucleus. Oncoids are generally larger than 2 mm.' (Hallsworth and Knox, 1999, p. 27). Synonymous with oncolite: A small, variously shaped, concentrically laminated, calcareous sedimentary structure, resembling an oolith, and formed by the accretion of successive layer[s]... It...generally does not exceed 10 cm in dimension. (Jackson, 1997, p. 446). |
| Broaderbroader |
coated particle
|
| See AlsoseeAlso | Particle Type |
| Is Defined ByisDefinedBy | Particle Type |