nummulitidae
Proper noun A family of fossil foraminiferans, specifically large, disc-shaped protoctists (single-celled organisms) that are abundant in certain Cenozoic marine sedimentary rocks, especially those of the Eocene epoch. They are significant in geology as index fossils and in the formation of some limestone deposits.
This term is used exclusively as a taxonomic name in scientific contexts, specifically in paleontology, micropaleontology, and historical geology. - The limestone cliffs were composed largely of Nummulitidae. - Researchers identified the microfossils as belonging to the family Nummulitidae.
- In Biostratigraphy: Used to date and correlate rock layers from the Paleogene period.
- The presence of Nummulitidae is a key indicator for the Middle Eocene.
- In Paleoenvironmental Reconstruction: Their abundance suggests specific ancient marine conditions.
- The assemblage of Nummulitidae points to a warm, shallow sea environment.
- Nummulite (n): The common name for an individual fossil belonging to the family Nummulitidae. It refers to the coin-shaped shell.
- The quarry yielded thousands of nummulites.
- Nummulitic (adj): Describing rocks or limestone containing or composed of nummulites.
- The famous Egyptian pyramids are built from nummulitic limestone.
- Large foraminifera (descriptive term, not a taxonomic synonym)
- Disc-shaped foraminifera (descriptive term)
This word has a single, highly specialized meaning within scientific nomenclature. It does not have idioms, phrasal verbs, or common figurative uses. Its usage is strictly technical.
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a family of fossil protoctists
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