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Sanna Alwmark

Sanna Alwmark

Associate senior lecturer

Sanna Alwmark

Ground penetrating radar observations of the contact between the western delta and the crater floor of Jezero crater, Mars

Author

  • David A. Paige
  • Svein Erik Hamran
  • Hans E.F. Amundsen
  • Tor Berger
  • Patrick Russell
  • Reva Kakaria
  • Michael T. Mellon
  • Sigurd Eide
  • Lynn M. Carter
  • Titus M. Casademont
  • Daniel C. Nunes
  • Emileigh S. Shoemaker
  • Dirk Plettemeier
  • Henning Dypvik
  • Sanna Holm-Alwmark
  • Briony H.N. Horgan

Summary, in English

The delta deposits in Jezero crater contain sedimentary records of potentially habitable conditions on Mars. NASA's Perseverance rover is exploring the Jezero western delta with a suite of instruments that include the RIMFAX ground penetrating radar, which provides continuous subsurface images that probe up to 20 meters below the rover. As Perseverance traversed across the contact between the Jezero crater floor and the delta, RIMFAX detected a distinct discontinuity in the subsurface layer structure. Below the contact boundary are older crater floor units exhibiting discontinuous inclined layering. Above the contact boundary are younger basal delta units exhibiting regular horizontal layering. At one location, there is a clear unconformity between the crater floor and delta layers, which implies that the crater floor experienced a period of erosion before the deposition of the overlying delta strata. The regularity and horizontality of the basal delta sediments observed in the radar cross sections indicate that they were deposited in a low-energy lake environment.

Department/s

  • Lithosphere and Biosphere Science

Publishing year

2024-01

Language

English

Publication/Series

Science Advances

Volume

10

Issue

4

Document type

Journal article

Publisher

American Association for the Advancement of Science (AAAS)

Topic

  • Geosciences, Multidisciplinary

Status

Published

ISBN/ISSN/Other

  • ISSN: 2375-2548