Perseverance and the Search Amongst the Sand
Mars Perseverance Sol 286 - Left Navigation Camera: NASA's Mars Perseverance rover acquired this image using its onboard Left Navigation Camera (Navcam). The camera is located high on the rover's mast and aids in driving. This image was acquired on Dec. 9, 2021 (Sol 286). Credits: NASA/JPL-Caltech. Download image ›

Since February 18, 2021,  Perseverance has been exploring the Jezero crater floor, including an exposure of rock and sand that the rover’s science team calls Séítah (which means “amongst the sand” in the Navajo language).

One of the main exploration targets within Jezero crater is the well-preserved delta deposit, and many of the predicted landing sites for the rover were clustered very near the scarp of this delta. However, during landing, the rover’s computer diverted the rover away from the delta to the eastern side of Séítah, which itself was considered too sandy and rocky for a safe landing.

NASA's Mars Perseverance rover acquired this image using its Left Mastcam-Z camera. Mastcam-Z is a pair of cameras located high on the rover's mast.
Mars Perseverance Sol 292 - Left Mastcam-Z Camera: NASA's Mars Perseverance rover acquired this image using its Left Mastcam-Z camera. Mastcam-Z is a pair of cameras located high on the rover's mast. This image was acquired on Dec. 15, 2021 (Sol 292). Credits: NASA/JPL-Caltech/ASU. Download image ›

While the rover’s detailed exploration of the Jezero delta will have to wait until later in the mission, the rover’s landing site has given the team an opportunity to dig into the geology and origin of the crater floor rock units.

During the first few months of the mission, Perseverance explored a heavily cratered rock unit containing abundant polygonal fractures and a composition similar to a basaltic volcanic rock.  In September 2021, Perseverance entered Séítah and began exploring a new and different geologic unit. The rocks in Séítah have a very interesting composition, and are mostly comprised of the mineral olivine. The rocks of Séítah also appear very similar to a geological unit that covers nearly 20,000 km2 outside of Jezero crater. Olivine is an igneous mineral, and is typically one of the first minerals to crystallize out of a magma. Scientists on the rover team are trying to understand how this olivine-rich rock could have formed. One of the ways we do this is by identifying “terrestrial analogues,” or rocks here on Earth that look similar to what the rover is seeing on Mars. One possibility could be ancient (3.5 billion year old) lava flows emplaced in Western Australia, close to the earliest good evidence of life here on Earth is preserved. The evidence of life is preserved in microbial mounds called “stromatolites”. Igneous rocks, like these Australian lava flows, can be easily dated and can provide important age constraints on the timing of geologic processes and conditions and provide context for any biologically mediated rocks that might be present. The olivine-bearing rocks of Séítah could provide important context and constraints on the timing of the Jezero crater lake.

As the rover wraps up its exploration of the crater floor, excitement is building for the next phase of the mission: the Jezero delta. Will we find evidence of ancient martian life on the delta? Stay tuned.

About This Blog

These blog updates are provided by self-selected Mars 2020 mission team members who love to share what Perseverance is doing with the public.

Dates of planned rover activities described in these blogs are subject to change due to a variety of factors related to the Martian environment, communication relays and rover status.

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  • Mariah Baker
    Planetary Scientist, Smithsonian National Air & Space Museum
    Washington, DC
  • Iona Brockie
    Sampling Engineer, NASA/JPL
    Pasadena, CA
  • Sawyer Brooks
    Docking Systems Engineer, NASA/JPL
    Pasadena, CA
  • Adrian Brown
    Deputy Program Scientist, NASA HQ
    Washington, DC
  • Denise Buckner
    Student Collaborator, University of Florida
    Gainesville, FL
  • Fred Calef III
    Mapping Specialist, NASA/JPL
    Pasadena, CA
  • Alyssa Deardorff
    Systems Engineer, NASA/JPL
    Pasadena, CA
  • Kenneth Farley
    Project Scientist, Caltech
    Pasadena, CA
  • Brad Garczynski
    Student Collaborator, Purdue University
    West Lafayette, IN
  • Erin Gibbons
    Student Collaborator, McGill University
    Montreal, Canada
  • Louise Jandura
    Chief Engineer for Sampling & Caching, NASA/JPL
    Pasadena, CA
  • Lydia Kivrak
    Student Collaborator, University of Florida
    Gainesville, FL
  • Rachel Kronyak
    Systems Engineer, NASA/JPL
    Pasadena, CA
  • Matt Muszynski
    Vehicle Systems Engineer, NASA/JPL
    Pasadena, CA
  • Pegah Pashai
    Vehicle Systems Engineer Lead, NASA/JPL
    Pasadena, CA
  • David Pedersen
    Co-Investigator, PIXL Instrument, Technical University of Denmark (DTU)
    Copenhagen, Denmark
  • Vivian Sun
    Science Operations Systems Engineer, Staff Scientist, NASA/JPL
    Pasadena, CA
  • Jennifer Trosper
    Project Manager, NASA/JPL
    Pasadena, CA
  • Rick Welch
    Deputy Project Manager, NASA/JPL
  • Roger Wiens
    Principal Investigator, SuperCam / Co-Investigator, SHERLOC instrument, LANL
    Los Alamos, NM

Tools on the Perseverance Rover+

The Perseverance rover has tools to study the history of its landing site, seek signs of ancient life, collect rock and soil samples, and help prepare for human exploration of Mars. The rover carries:


Where is the Rover?

Image of a rover pin-point at Perseverance's location on Mars, Jezero Crater

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