Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For many years, researchers believed that Earth remained in a "stagnant lid" state until at least the end of the Hadean.

From Science Daily • Dec. 4, 2025

The Hadean Eon, which stretched from 4.6 to 4.0 billion years ago, represents one of the least understood periods in Earth's past.

From Science Daily • Dec. 4, 2025

The zircons represent a rare report from the mysterious Hadean, the geological time period that ended about 4 billion years ago, 500 million years after Earth’s formation.

From Science Magazine • Apr. 30, 2024

The oldest is the Hadean, which marks the period in which our planet first formed some 4.5 billion years ago, around the same time our moon formed as well.

From Salon • Dec. 13, 2023

Just at this time the door fell through and the flames and smoke rolled in like a whirlwind from the Hadean river Cocytus.

From The Life of Phineas T. Barnum by Benton, Joel