Hesperian

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Hesperian western. XVI. f. L. hesperius, Gr. hespérios, f. Hesperia, Gr. Hespería (poet.) land of the west, f. Hesperus, Hésperos, adj. western, sb. evening star; see -IAN.

The Concise Oxford Dictionary of English Etymology T. F. HOAD

Hesperian

views updated May 08 2018

Hesperian A division of areological time, lasting from 3.50 Gy to 1.80 Gy in the Hartmann—Tanaka Model and 3.80 Gy to 3.55 Gy in the Neukum—Wise Model, and divided into two epochs: Lower Hesperian (3.50–3.10 or 3.80–3.70 Gy); and Upper Hesperian (3.10–1.80 or 3.70–3.55 Gy).

A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY

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Hesperian

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