A new study of crater concentric ridges on the Moon

Corwin Atwood-Stone, Veronica J. Bray, Alfred S. McEwen

Research output: Research - peer-reviewArticle

Abstract

Crater concentric ridges (CCRs) are topographic ridges found in the ejecta blankets of fresh few-kilometer-scale lunar craters. These ridges, which were last studied in detail in the late 1970. s (referred to as 'lunar concentric dunes'), were hypothesized to form due to ballistic impact sedimentation and erosion. We have surveyed the Moon to find 59 craters with CCRs and have constructed mosaics of these craters where possible using high-resolution LROC NAC (Lunar Reconnaissance Orbiter Camera-Narrow Angle Camera) images. We then map from some of these mosaics in order to measure the CCRs and examine their morphologies. Ejecta scaling models and some of our observations of the CCRs contradict the current hypothesis for the formation of these features. We therefore propose new hypotheses to consider for the formation of CCRs, specifically interaction of ejecta with initial topography or formation via interactions of shocks in the ejecta. Additionally, for the first time we have found CCRs on Mercury, but they are rare or absent on Mars.

LanguageEnglish (US)
Pages196-204
Number of pages9
JournalIcarus
Volume273
DOIs
StatePublished - Jul 15 2016

Fingerprint

moon
craters
ridges
crater
Moon
ejecta
cameras
interactions
mosaic
Lunar Reconnaissance Orbiter
lunar craters
dunes
blankets
mars
ballistics
erosion
topography
shock
scaling
high resolution

Keywords

  • Cratering
  • Impact processes
  • Mercury, surface
  • Moon, surface
  • Regoliths

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

A new study of crater concentric ridges on the Moon. / Atwood-Stone, Corwin; Bray, Veronica J.; McEwen, Alfred S.

In: Icarus, Vol. 273, 15.07.2016, p. 196-204.

Research output: Research - peer-reviewArticle

Atwood-Stone C, Bray VJ, McEwen AS. A new study of crater concentric ridges on the Moon. Icarus. 2016 Jul 15;273:196-204. Available from, DOI: 10.1016/j.icarus.2016.03.012
Atwood-Stone, Corwin ; Bray, Veronica J. ; McEwen, Alfred S./ A new study of crater concentric ridges on the Moon. In: Icarus. 2016 ; Vol. 273. pp. 196-204
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