Hesperian epoch

== English == === Etymology === Named for the Hesperia Planum === Proper noun === Hesperian epoch 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. ==== Further reading ==== Geology of Mars on Wikipedia.Wikipedia