Geological Time Scale Terminology

noun a very long period of time; an indefinitely long period of time

• It took an eon for the starlight to reach Earth.
• I feel like I've been waiting an eon for this package to arrive.
• I haven't seen you in an eon, where have you been?
• The ancient ruins have stood for eons, a testament to the passage of time.

noun the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock

• The fossil record provides valuable insights into the history of life on Earth.
• My dad found a cool fossil on our hike yesterday.
• That old car is a fossil, man.
• Her outdated views on politics are like a fossil from another era.

noun A scientist who studies fossils to learn about organisms that lived in the past

• The paleontologist carefully excavated the dinosaur fossils from the dig site.
• My friend is studying to become a paleontologist and is obsessed with all things prehistoric.
• Some people think paleontologists just dig up old bones, but it's much more complex than that.
• As a paleontologist of human behavior, she was able to uncover the hidden truths of society.