paleocene epoch
Definition
- Proper noun:
- A geologic epoch: The Paleocene Epoch is the first epoch of the Paleogene Period and the Cenozoic Era. It is a specific interval of geologic time, defined by its position in the Earth's history and characterized by specific fossil evidence and climatic conditions following a major extinction event.
Usage
- The term "Paleocene Epoch" is used in scientific contexts, specifically in geology, paleontology, and earth sciences, to refer to this distinct time period. It is always capitalized.
Examples
- Proper noun:
- Fossils from the Paleocene Epoch show the rapid diversification of mammals after the extinction of the dinosaurs.
- The climate during the Paleocene Epoch was generally warmer than today.
- Scientists study rock layers to understand the environmental changes of the Paleocene Epoch.
Advanced Usage
- "Early/Late/Middle Paleocene": Used to specify subdivisions within the epoch.
- This fossil is characteristic of the Late Paleocene.
- Used in formal scientific names for fauna and flora from this time.
- This species is a Paleocene mammal.
Variants and Related Words
- Paleocene (adj., n.): The adjectival form and a common shorthand for the epoch.
- Paleocene rocks; The Paleocene was a time of recovery.
- Paleogene Period: The geologic period containing the Paleocene, Eocene, and Oligocene Epochs.
- Cenozoic Era: The current geologic era, which began after the Mesozoic Era and includes the Paleocene Epoch.
Synonyms
- Lower Paleogene (in some regional stratigraphic contexts, though not a perfect synonym as it may include slightly different time boundaries).
Related Terms and Context
- K-Pg boundary: The Cretaceous–Paleogene boundary, the geologic marker (often a thin layer of clay) that defines the end of the Mesozoic Era and the beginning of the Paleogene Period and thus the Paleocene Epoch. This boundary is associated with a mass extinction event.
- Danian: The first age (a subdivision of an epoch) within the Paleocene Epoch.
Noun
-
from 63 million to 58 million years ago; appearance of birds and earliest mammals
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