Hypernym

period 4

noun

a unit of geological time during which a system of rocks formed

Part_meronym

Paleoproterozoic 1

noun

The Paleoproterozoic (also spelled Palaeoproterozoic) is the first of the three eras of the Proterozoic occurring between 2,500 to 1,600 million years ago.

Siderian 1

noundomain: time

EnWordnet [ver.5.0]

English

Definition

the first geologic period in the Paleoproterozoic Era that lasted from 2500 to 2300 million years ago.

Examples

1.Abundance of banded iron formations peaked early the Siderian period.

Part_holonym

Paleoproterozoic 1

noun

The Paleoproterozoic (also spelled Palaeoproterozoic) is the first of the three eras of the Proterozoic occurring between 2,500 to 1,600 million years ago.

Project co-funded by European funds