Mesoscale raised rim depressions (MRRDs) on Earth: A review of the characteristics, processes, and spatial distributions of analogs for Mars

Devon M. Burr, Barbara C. Bruno, Peter D. Lanagan, Lori S. Glaze, Windy L. Jaeger, Richard J. Soare, Jean Michel Wan Bun Tseung, James A. Skinner, Stephen M. Baloga

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Fields of mesoscale raised rim depressions (MRRDs) of various origins are found on Earth and Mars. Examples include rootless cones, mud volcanoes, collapsed pingos, rimmed kettle holes, and basaltic ring structures. Correct identification of MRRDs on Mars is valuable because different MRRD types have different geologic and/or climatic implications and are often associated with volcanism and/or water, which may provide locales for biotic or prebiotic activity. In order to facilitate correct identification of fields of MRRDs on Mars and their implications, this work provides a review of common terrestrial MRRD types that occur in fields. In this review, MRRDs by formation mechanism, including hydrovolcanic (phreatomagmatic cones, basaltic ring structures), sedimentological (mud volcanoes), and ice-related (pingos, volatile ice-block forms) mechanisms. For each broad mechanism, we present a comparative synopsis of (i) morphology and observations, (ii) physical formation processes, and (iii) published hypothesized locations on Mars. Because the morphology for MRRDs may be ambiguous, an additional tool is provided for distinguishing fields of MRRDs by origin on Mars, namely, spatial distribution analyses for MRRDs within fields on Earth. We find that MRRDs have both distinguishing and similar characteristics, and observation that applies both to their mesoscale morphology and to their spatial distribution statistics. Thus, this review provides tools for distinguishing between various MRRDs, while highlighting the utility of the multiple working hypotheses approach.

Original languageEnglish (US)
Pages (from-to)579-596
Number of pages18
JournalPlanetary and Space Science
Volume57
Issue number5-6
DOIs
StatePublished - May 2009
Externally publishedYes

Keywords

  • Mars
  • Spatial analysis
  • Surface
  • Terrestrial analogs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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