Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2022 Sep 30;377(6614):eabo2196.
doi: 10.1126/science.abo2196. Epub 2022 Sep 30.

Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars

K A Farley  1 K M Stack  2 D L Shuster  3 B H N Horgan  4 J A Hurowitz  5 J D Tarnas  2 J I Simon  6 V Z Sun  2 E L Scheller  1 K R Moore  1 S M McLennan  5 P M Vasconcelos  7 R C Wiens  8 A H Treiman  9 L E Mayhew  10 O Beyssac  11 T V Kizovski  12 N J Tosca  13 K H Williford  14 L S Crumpler  15 L W Beegle  2 J F Bell 3rd  16 B L Ehlmann  1 Y Liu  2 J N Maki  2 M E Schmidt  12 A C Allwood  2 H E F Amundsen  17 R Bhartia  18 T Bosak  19 A J Brown  20 B C Clark  21 A Cousin  22 O Forni  22 T S J Gabriel  23 Y Goreva  2 S Gupta  24 S-E Hamran  17 C D K Herd  25 K Hickman-Lewis  26   27 J R Johnson  28 L C Kah  29 P B Kelemen  30 K B Kinch  31 L Mandon  32 N Mangold  33 C Quantin-Nataf  34 M S Rice  35 P S Russell  36 S Sharma  2 S Siljeström  37 A Steele  38 R Sullivan  39 M Wadhwa  16 B P Weiss  2   19 A J Williams  40 B V Wogsland  29 P A Willis  2 T A Acosta-Maeda  41 P Beck  42 K Benzerara  11 S Bernard  11 A S Burton  43 E L Cardarelli  2 B Chide  8 E Clavé  44 E A Cloutis  45 B A Cohen  46 A D Czaja  47 V Debaille  48 E Dehouck  34 A G Fairén  49   50 D T Flannery  51 S Z Fleron  52 T Fouchet  32 J Frydenvang  53 B J Garczynski  4 E F Gibbons  54 E M Hausrath  55 A G Hayes  50 J Henneke  56 J L Jørgensen  56 E M Kelly  41 J Lasue  22 S Le Mouélic  33 J M Madariaga  57 S Maurice  22 M Merusi  31 P-Y Meslin  22 S M Milkovich  2 C C Million  58 R C Moeller  2 J I Núñez  28 A M Ollila  59 G Paar  60 D A Paige  36 D A K Pedersen  56 P Pilleri  22 C Pilorget  61   62 P C Pinet  22 J W Rice Jr  16 C Royer  11 V Sautter  11 M Schulte  63 M A Sephton  24 S K Sharma  41 S F Sholes  2 N Spanovich  2 M St Clair  58 C D Tate  50 K Uckert  2 S J VanBommel  64 A G Yanchilina  65 M-P Zorzano  50
Affiliations

Aqueously altered igneous rocks sampled on the floor of Jezero crater, Mars

K A Farley et al. Science. .

Abstract

The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river deposits. We report observations of the crater floor, below the crater's sedimentary delta, finding that the floor consists of igneous rocks altered by water. The lowest exposed unit, informally named Séítah, is a coarsely crystalline olivine-rich rock, which accumulated at the base of a magma body. Magnesium-iron carbonates along grain boundaries indicate reactions with carbon dioxide-rich water under water-poor conditions. Overlying Séítah is a unit informally named Máaz, which we interpret as lava flows or the chemical complement to Séítah in a layered igneous body. Voids in these rocks contain sulfates and perchlorates, likely introduced by later near-surface brine evaporation. Core samples of these rocks have been stored aboard Perseverance for potential return to Earth.

PubMed Disclaimer

Publication types