Geologic Time Periods

noun a person or thing that is third in order or level

adjective relating to or denoting a higher education institution that offers courses beyond the secondary level

• The tertiary education sector plays a crucial role in shaping the future workforce.
• I'm thinking about pursuing a tertiary degree after finishing high school.
• I heard that party is going to be lit, it's at the tertiary campus.
• In the hierarchy of needs, self-actualization is considered a tertiary concern.

noun a proper noun referring to a specific geological period in Earth's history, known for the diversification of life forms

article a determiner used before a noun to specify or limit it

• The Cambrian period is known for the rapid diversification of marine life.
• Have you heard about all the cool creatures that lived during the Cambrian?
• The Cambrian was like the ultimate marine life party!
• Exploring the Cambrian period is like taking a journey back in time to the birth of complex life forms.

noun a period of geological time that occurred approximately 251 to 199 million years ago, known for the first appearance of dinosaurs and the breakup of the supercontinent Pangaea

• The Triassic period occurred between 251 million and 201 million years ago.
• Hey, did you know dinosaurs first appeared in the Triassic period?
• The Triassic was when all the cool dinosaurs started popping up.
• Exploring the Triassic period is like taking a journey back in time to when dinosaurs roamed the Earth.