iiinova — where your digital self keeps evolving

Reposted by Dr. Lonneke Roelofs

planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 01/07/2026

🌌 July’s Planetary Geomorphology Image of the Month is here! A fan-shaped deposit in Valles Marineris, Mars, could mark an ancient shoreline. Ignatius “Arga” Argadestya explores this feature using CaSSIS color images and derived 3D views. A clue to Mars' watery past? 🔴🛰️🌊 #Mars #PlanetaryScience

planetarygeomorphology.wordpress.com

Fan-Shaped Deposit as Paleoshoreline Marker in Valles Marineris, Mars

Post contributed by Ignatius “Arga” Argadestya (PhD Candidate), Institute of Geological Sciences, Space Research and Planetary Science Division, University of Bern, Switzerland. Scarp-fronted depos…

063

Dr. Lonneke Roelofs @lonnekeroelofs.bsky.social · 02/04/2026

My wonderful friend @spidrwoman.bsky.social has been studying these beautiful features called "Lake Stars". They occur on Earth, but also on a moon very far away - Jupiter's moon Europa. Here, they might reveal the presence of liquid water underneath an icy shell covering the moon's surface.

010

Reposted by Dr. Lonneke Roelofs

Faculty of Geosciences, Utrecht University @uugeo.bsky.social · 03/03/2026

Moving boulders and gullies that look suspiciously like rivers, not on Earth but on Mars! For years scientists have wondered about this; is this evidence of water on Mars? Earth scientist @lonnekeroelofs.bsky.social discovered that CO2 plays a pivotal role. youtu.be/h6qzVV6uI5U?...

youtu.be

Hoe verplaatst deze steen van 10.000 kilo op Mars?

YouTube video by Universiteit van Nederland

001

Reposted by Dr. Lonneke Roelofs

planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 12/01/2026

Call for Abstracts 📣 Our session "Planetary Geomorphology and Surface Processes" - GM6.1, at the EGU (3-8 May 2026 in Vienna) will provide a platform for cross-planetary discussion on geomorphological and geological processes. Abstract deadline is January 15!

Image showing an advertisement for the "Planetary Geomorphology and Surface Processes" session at EGU 2026 (between 3-8 May 2026). Deadline for abstract submission is the 15th of January 2026. On the image you can see a large dark coloured dune field in a larger impact crater on Mars. Smaller impact craters are also visible on the image. List of conveners of the session is also given; Lonneke Roelofs, Stephen Brough, Lisanne Braat, Joe McNeil and Nikolaus Kuhn. A QR code is provided that links to the session's webpage: https://meetingorganizer.copernicus.org/EGU26/sessionprogramme/5864

001

Reposted by Dr. Lonneke Roelofs

AGU (American Geophysical Union) @agu.org · 07/12/2025

Some of the dune fields on #Mars form unique parallel channels called "linear dune gullies." New evidence suggests that these channels were formed by sliding and burrowing blocks of CO2 ice, rather than by liquid water as previously theorized. 🔗 buff.ly/Qpt5cqx #AGUPubs #Planets #SpaceScience

New in GRL: Sliding and Burrowing Blocks of CO2 Create Sinuous “Linear Dune Gullies” on Martian Dunes by Explosive Sublimation-Induced Particle Transport by RoeLofs et al 2025

083

Reposted by Dr. Lonneke Roelofs

planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 03/11/2025

The #Planetary Geomorphology Image 📸 of the Month November is now online! Dr. Susana del C. Fernández takes us to the moon, in a search for for lithium and water ice! 🔋🧊🌕 planetarygeomorphology.wordpress.com/2025/11/01/l...

planetarygeomorphology.wordpress.com

Lunar Surface Geomorphology as a tool to find Lithium and Water Ice

Post contributed by Dr. S. del C. Fernández, Department of Geology, University of Oviedo, Spain – Coordinator of MapPlaneST The geomorphology of the lunar surface plays a key role in assessin…

011

Reposted by Dr. Lonneke Roelofs

Faculty of Geosciences, Utrecht University @uugeo.bsky.social · 13/10/2025

It's a phenomenon never seen before. Under normal conditions it doesn't even occur on Earth: the carving of gullies by CO2 ice blocks. Earth scientist @lonnekeroelofs.bsky.social proved that this may explain the formation of dune gullies on Mars www.uu.nl/en/news/myst... @astrobiologyou.bsky.social

071

Reposted by Dr. Lonneke Roelofs

planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 01/10/2025

The IAG #Planetary Gemorphology Image of the Month 📸 October is online! Dr. Abdallah Zaki takes us on a field trip to ancient Mars, by studying hourglass-shaped landforms ⌛ - remnants of source-to-sink river systems💧🌕🧐👩‍🚀 #Mars #rivers #space planetarygeomorphology.wordpress.com/2025/10/01/h...

planetarygeomorphology.wordpress.com

Hourglass landforms: Evidence of source-to-sink fluvial deposition

Post contributed by Dr. Abdallah S. Zaki, Jackson School of Geosciences, University of Texas at Austin Mars provides an exceptional geological archive, preserving billions of years of pre-existing …

022

Reposted by Dr. Lonneke Roelofs

planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 16/09/2025

‪The IAG #Planetary Gemorphology Image of the Month 📸 for September is online! Dr. Anna Szynkiewicz shows evidence of late fluid flows in Gale crater, as she compares Martian sulfate-rich salt deposits with those on Earth! 🧂💧👩‍🚀 planetarygeomorphology.wordpress.com/2025/09/01/b...

planetarygeomorphology.wordpress.com

Bright-toned sulfate-rich salts on Mars:Evidence of late fluid flows in Gale crater

Post contributed by Dr. Anna Szynkiewicz, Department of Earth & Planetary Sciences, University of Tennessee, USA Various secondary sulfate minerals have been detected by the Curiosity rover in …

011

Reposted by Dr. Lonneke Roelofs

planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 05/08/2025

The IAG #Planetary Gemorphology Image of the Month 📸 for August is now online! A team of researchers discusses the colourful and bright dusty halos that occur on Martian sand dunes in early spring. The halos are a good indicator of mass-wasting driven by the seasonal sublimation of CO2 ice! 🌕😇✨

planetarygeomorphology.wordpress.com

Bright dusty halos around mass wasting on Martian Sand dunes

Post contributed by Maria Kefa (master student), Dr. Susan Conway – LPG Nantes & Dr. Lonneke Roelofs – Utrecht University Mars’ winters are sufficiently cold that carbon dioxide (CO…

021

Reposted by Dr. Lonneke Roelofs

planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 04/04/2025

‪The IAG #Planetary Gemorphology Image of the Month 📸 for April is now available. Undergraduate student Kyleshaquill Fred Velez takes us to Enceladus, an icy moon of Saturn, where mass wasting occurs on the steep slopes along tectonic features. planetarygeomorphology.wordpress.com/2025/04/01/p...

$A four panel image showing black and white photos of the surface of Enceladus. The surface of Enceladus is highly fractured and hosts a lot of craters. In the images, steep slopes around the geological structures are highlighted on which darker streaks are present.$

021

Dr. Lonneke Roelofs @lonnekeroelofs.bsky.social · 01/02/2025

Our new image of the month blog post is available on our website! This month a team of wonderful scientists shared their work on Martian clouds. The images are stunning! 😍 #Mars #clouds

030