Triassic
/trai'æsik/
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Definition
Adjective:
- Of or relating to the Triassic period: Pertaining to the first geological period of the Mesozoic Era, characterized by the rise of dinosaurs, marine reptiles, and significant volcanic activity.
- Denoting the Triassic period: Used to describe rocks, fossils, or events from this specific time in Earth's history.
Noun:
- The Triassic period: A geological period spanning from approximately 252 to 201 million years ago, following the Permian and preceding the Jurassic period. It marks the beginning of the Mesozoic Era.
Usage Examples
- Adjective:
- Triassic rocks are often red in color due to desert conditions at that time.
- Scientists study Triassic fossils to understand early dinosaur evolution.
- Noun:
- The Triassic ended with a major mass extinction event.
- Many important reptile groups first appeared in the Triassic.
Advanced Usage
- "Triassic-Jurassic boundary": The geological transition between the Triassic and Jurassic periods, associated with a significant extinction event.
- Research at the Triassic-Jurassic boundary helps explain the rise of the dinosaurs.
Variants and Related Words
- Trias (n, archaic): An older term for the Triassic period or system.
- Triassic System (n): The stratigraphic rock layers deposited during the Triassic period.
Synonyms
- Lower Mesozoic (adj/n): A less common term referring to the early part of the Mesozoic Era, which includes the Triassic.
- Post-Permian (adj): Referring to the time after the Permian period; can encompass the Triassic.
Related Phrases
- "Triassic fauna": The animal life characteristic of the Triassic period.
- The Triassic fauna included the first true mammals.
- "Late Triassic": The final epoch of the Triassic period.
- The first dinosaurs diversified in the Late Triassic.
Adjective
- of or relating to or denoting the first period of the Mesozoic era
Noun
- from 230 million to 190 million years ago; dinosaurs, marine reptiles; volcanic activity