For Hadean we have terms and definitions in 2 topics. The topics are Paleontology and Physical Geography.

Hadean (Paleontology)

The earliest subdivision of the Precambrian, spanning the time between the formation of the Earth, about 4.5 billion years ago, and the start of the Archaean era, 3.8 billion years ago. This interval predates the period of true geologic time since no rocks of this age are known on Earth, with the exception of a few meteorites.

Hadean (Physical Geography)

Geologic eon that occurred from 3800 to 4600 million years ago. The Earth's oldest rocks date to the end of this time period.

Similar

Browse words that start with:

• Ha
• Had
• Hade
• Hadea
• Hadean

Browse All Terms by First Letter

Term Search