English Explanatory Dictionary

Hesperian epoch

English dictionary entry

Meanings

name
  1. The second of the three Martian geologic epochs, approximately from 3,500 million years ago to 1,800 million years ago, marked by lava flows, preceded by the Noachian epoch, and followed by the Amazonian epoch.

Word forms

Hesperian epoch

Etymology

Named for the Hesperia Planum

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