Stromatolites in the Nevada Desert
Jet Propulsion Laboratory https://www.jpl.nasa.gov/ May 6, 2020
Made from fossilized microbes and sediment, these rounded rocks are stromatolites that were found in a dry lakebed during the field exercise. Scientists hope to find something similar in the dry lakebed Perseverance will be exploring on Mars.
For more information about the mission, go to https://mars.nasa.gov/mars2020/.