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.

Orosirian 1

noundomain: time

EnWordnet [ver.5.0]

English

Definition

The Orosirian is the third geologic period in the Paleoproterozoic Era and lasted from 2050 to 1800 million years ago.

Examples

1.Two of the largest known impact events on Earth occurred during the Orosirian.

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