Dr. Joe McNeil
@joemcneil.bsky.social
Planetary Scientist at the Natural History Museum. Martian geomorphology, mineralogy, and mapping.
Give it a read, open access, at: doi.org/10.1038/s415...
Dichotomy retreat and aqueous alteration on Noachian Mars recorded in highland remnants - Nature Geoscience
The Martian dichotomy boundary receded hundreds of kilometres in the Mawrth Vallis region and left behind mounds that record changing aqueous conditions during the Noachian (4.1–3.7 Ga), according to ...
doi.org
January 20, 2025 at 4:40 PM
Give it a read, open access, at: doi.org/10.1038/s415...
The mounds are geochemically similar to the plains of Oxia Planum, the future landing site of the ExoMars Rosalind Franklin rover. Thus, when ExoMars is exploring these plains, it will also be exploring widespread regional environments beyond the landing site alone.
January 20, 2025 at 4:40 PM
The mounds are geochemically similar to the plains of Oxia Planum, the future landing site of the ExoMars Rosalind Franklin rover. Thus, when ExoMars is exploring these plains, it will also be exploring widespread regional environments beyond the landing site alone.
These erosional remnants contain hundreds of meters of clay-rich stratigraphy, indicating liquid water was present here for a substantial amount of time. The clays are bounded above and below by unaltered material, documenting (almost) the entire aqueous history of the region.
January 20, 2025 at 4:40 PM
These erosional remnants contain hundreds of meters of clay-rich stratigraphy, indicating liquid water was present here for a substantial amount of time. The clays are bounded above and below by unaltered material, documenting (almost) the entire aqueous history of the region.
The headlines: Mars' highlands once extended hundreds of kilometres further north in the Chryse Planitia region. In the Noachian, between 3.8 and 4.0 billion years ago, erosion removed the edge of the highlands, leaving remnant mounds.
January 20, 2025 at 4:40 PM
The headlines: Mars' highlands once extended hundreds of kilometres further north in the Chryse Planitia region. In the Noachian, between 3.8 and 4.0 billion years ago, erosion removed the edge of the highlands, leaving remnant mounds.
Super excited to start fresh here (and by “start fresh”, I mean “lurk in the background and occasionally post when I remember”, as is tradition).
November 27, 2024 at 8:50 AM
Super excited to start fresh here (and by “start fresh”, I mean “lurk in the background and occasionally post when I remember”, as is tradition).
My research covers many aspects of martian stratigraphy, geomorphology, and mineralogy, and I’m always up for chatting about planetary science in general.
November 27, 2024 at 8:50 AM
My research covers many aspects of martian stratigraphy, geomorphology, and mineralogy, and I’m always up for chatting about planetary science in general.
I use remote sensing data to study the role of water on ancient Mars. Basically, if it was once wet, is now rock, and happens to be on Mars, I’m interested in investigating it from orbit. But I’m more than happy to look at any and all planetary surfaces!
November 27, 2024 at 8:50 AM
I use remote sensing data to study the role of water on ancient Mars. Basically, if it was once wet, is now rock, and happens to be on Mars, I’m interested in investigating it from orbit. But I’m more than happy to look at any and all planetary surfaces!