eocene
/'i:ousi:n/
Học thuậtThân thiện
Definition
- Proper noun:
- The Eocene epoch: A major division of geological time within the Paleogene Period, following the Paleocene and preceding the Oligocene. It is characterized by a warm global climate and the emergence and diversification of many modern mammalian orders.
Usage
- The word "Eocene" is used as a proper noun to refer to a specific geological epoch. It is typically capitalized and often used with the definite article "the" (e.g., ). It functions as a noun phrase in sentences, commonly appearing as the subject or object.
Examples
- Proper noun:
- Fossils from the Eocene provide crucial evidence for mammalian evolution.
- The global climate during the Eocene was significantly warmer than today.
- Scientists study Eocene rock layers to understand ancient ecosystems.
Advanced Usage
- "Eocene-Oligocene boundary": Refers to the transition between the Eocene and Oligocene epochs, marked by a significant cooling event.
- The extinction event at the Eocene-Oligocene boundary reshaped marine life.
- "Middle Eocene": A subdivision of the Eocene epoch.
- This fossil is dated to the Middle Eocene.
Variants and Related Words
- Eocene Epoch: A more formal, full name for the epoch.
- The Eocene Epoch lasted approximately 18 million years.
- Paleogene: The geological period that contains the Eocene epoch.
- Paleocene: The geological epoch immediately before the Eocene.
- Oligocene: The geological epoch immediately after the Eocene.
Synonyms
- Eocene epoch: The full, formal term.
- Eocene Age: A less common but acceptable synonym.
Related Phrases
- Eocene fauna: The animal life characteristic of the Eocene epoch.
- The Eocene fauna included early horses and whales.
- Eocene climate: Refers specifically to the climatic conditions of that time.
- Models of the Eocene climate help predict future warming scenarios.
Noun
- from 58 million to 40 million years ago; presence of modern mammals