Peculiar Pale Pebbles - Overlook Horizon

Mars: Perseverance (Mars 2020) Perseverance Home Mission Overview Rover Components Mars Rock Samples Where is Perseverance? Ingenuity Mars Helicopter Mission Updates Science Overview Objectives Instruments Highlights Exploration Goals News and Features Multimedia Perseverance Raw Images Images Videos Audio More Resources Mars Missions Mars Sample Return Mars Perseverance Rover Mars Curiosity Rover MAVEN Mars Reconnaissance Orbiter Mars Odyssey More Mars Missions The Solar System The Sun Mercury Venus Earth The Moon Mars Jupiter Saturn Uranus Neptune Pluto & Dwarf Planets Asteroids, Comets & Meteors The Kuiper Belt The Oort Cloud 3 min read

Peculiar Pale Pebbles NASA’s Perseverance rover acquired this image of a field of bright white float rocks on the Jezero crater rim using its onboard Right Navigation Camera (Navcam). The camera is located high on the rover’s mast and aids in driving. The image was acquired on Oct. 27, 2024 (Sol 1311) at the local mean solar time of 16:02:45. NASA/JPL-Caltech Perseverance acquired this image of a possible breccia outcrop on the Jezero crater rim 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 Oct. 27, 2024 (Sol 1311) at the local mean solar time of 12:52:58. NASA/JPL-Caltech/ASU

During its recent exploration of the crater rim, Perseverance diverted to explore a strange, scattered field of bright white rocks which sparked the interest of the team scientists.

Perseverance has been climbing up the steep slopes of the Jezero crater rim for over two months now, and ever since approaching the edge of the crater has been spying increasingly diverse and strange-looking rocks. Back in the Jezero inlet channel, Neretva Vallis, Perseverance spotted a whole host of colourful boulders at Mount Washburn, and more recently the science team and internet alike were mesmerised by Freya Castle – a rock striped like a zebra! The crater rim hasn’t finished delivering surprises yet though… Just as we humans were preparing for Halloween back on Earth, a ghostly field of bright white rocks appeared in Perseverance’s view, at the base of a mound in the crater rim termed “Mist Park”, and sparking a new mystery for the science team to unravel.

On Earth, we find white rocks in a wide array of geologic settings, and that’s not surprising given the diverse array of light-toned minerals which can be generated across Earth’s various tectonic settings. On Mars however, with its lack of plate tectonics and a basaltic crust dominated by dark minerals like olivine and pyroxene, white rocks are a rare find. The science team planned several observations using Perseverance’s remote sensing instruments to assess the composition of these peculiar pebbles, including multispectral imaging with Mastcam-Z and zapping them with Supercam’s laser. Hopefully these observations can shed light on how these white rocks formed all the way up here on the crater rim. Unfortunately, none of the rocks were big enough to safely inspect them up close with Perseverance’s robotic arm instruments, but the team are on the lookout for larger blocks or outcrops of this strange lithology as we continue traversing upslope.

Aside from their composition, another mystery is just how these rocks got here. The blocks are all float (float = loose rocks, not in their original location), and scattered over just a few square meters. Perhaps these could be erosional leftovers of some kind of resistant vein or rock layer, where the softer, surrounding lithologies have eroded away? Or could these blocks have tumbled downslope from a more continuous bedrock exposure of enigmatic white material? Who knows, but Perseverance will be keeping its eyes peeled for more of these bizarre blocks as it continues to summit new heights…

Written by Alex Jones, PhD student at Imperial College London

Downloads

Perseverance Raw Images

Mars Perseverance Sol 1311: Right Navigation Camera (Navcam) Nov 12, 2024

PNG ()

Mars Perseverance Sol 1311: Left Mastcam-Z Camera Nov 12, 2024

PNG ()

Details Last Updated Nov 12, 2024 Related Terms Blogs

Keep Exploring Discover More Topics From NASA Mars

Mars is the fourth planet from the Sun, and the seventh largest. It’s the only planet we know of inhabited…

All Mars Resources

Explore this collection of Mars images, videos, resources, PDFs, and toolkits. Discover valuable content designed to inform, educate, and inspire,…

Rover Basics

Each robotic explorer sent to the Red Planet has its own unique capabilities driven by science. Many attributes of a…

Mars Exploration: Science Goals

The key to understanding the past, present or future potential for life on Mars can be found in NASA’s four…