Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Hesperian

  • Ernst Hauber
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_718-3

Definition

The middle of three systems (of time-stratigraphic units) or periods (the chronological equivalents to systems) in the Martian stratigraphic scheme, named after the region of Hesperia Planum (Hesperia: “The Occident”; see U.S. Geological Survey Gazetteer of Planetary Nomenclature). Depending on the different models to determine absolute ages on planetary surfaces by crater statistics, the Hesperian began ∼3.8 billion years ago and ended at some point between 3.55 and 1.8 billion years ago.

See Also

Keywords

Bioorganic Chemistry Geological Survey Planetary Surface Stratigraphic Scheme Crater Statistic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Deutsches Zentrum für Luft- und Raumfahrt (DLR) e.V.Institut für PlanetenforschungBerlinGermany