Encyclopedia of Planetary Landforms

2015 Edition
| Editors: Henrik Hargitai, Ákos Kereszturi

Crater Cluster (Atmospheric Breakup)

Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-3134-3_74

Definition

Group of separated (sometimes overlapping) impact craters that formed simultaneously, likely by the breakup of an impacting body in the atmosphere.

Synonyms

 Crater field;  Multiple crater; On Venus, if overlapping:  irregular crater

Description

A given cluster’s size depends on atmospheric density, strength and density of the impactor, and speed and angle of atmospheric entry. Individual craters in Martian clusters have diameters of a few tens of meters down to the limit of detection, and the clusters can be spread over areas from 10s of meters to a few 100 m across (Popova et al. 2003; 2007; Daubar et al. 2013). On Venus, irregular craters are a tight cluster of 1–10 km-sized impact craters characterized by irregular and/or discontinuous rims and hummocky or multiple floors (Fig. 1).
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References

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.University of ArizonaTucsonUSA
  2. 2.Earth and Planetary SciencesUniversity of CaliforniaSanta CruzUSA