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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 01/09/2026

⛰️ September’s Planetary Geomorphology Image of the Month is here! Venus’ tesserae are thought to be ancient. @theplanetaryguy.com explores evidence that highland margins are deformed young volcanic plains, shaped by recent tectonic activity—perhaps still active today. 🛰️🌕🔥 #Venus #PlanetaryScience

planetarygeomorphology.wordpress.com

Are Parts of Venus’ Oldest Rocks Actually Its Youngest?

Post contributed by Prof. Paul K. Byrne, Associate Professor, Department of Earth, Environment, and Planetary Sciences, Washington University in St. Louis. @ThePlanetaryGuy.com Among the many enigm…

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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 03/08/2026

🌌 August’s Planetary Geomorphology Image of the Month is here! Pluto’s bladed terrain is one of the dwarf planet’s most enigmatic landscapes. Victor Belissa explores how these huge ridges may have formed through sublimation waves driven by Pluto’s near-surface winds. 🧊💨🌑 #Pluto #PlanetaryScience

planetarygeomorphology.wordpress.com

Revisiting the Enigma of Pluto’s Most Enigmatic Terrain: The Bladed Deposits of Tartarus Dorsa

Post contributed by Victor Belissa (Phd student), Laboratoire de Planétologie et Géosciences (LPG), Nantes Université, CNRS, France. When NASA’s New Horizons spacecraft flew past Pluto in 201…

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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…

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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 01/06/2026

📸 The June Planetary Geomorphology Image of the Month is now online! Dr. Roodra Manogaran investigates intriguing pit complexes in Sputnik Planitia on #Pluto, revealing links to tectonic lineations and suggesting they may have formed as a result of fluid seepage. 🌑🛰️🔍 bit.ly/3PCPrWG

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Geomorphological Evidence of Fluid Seepage in Pit Complex Formation, Pioneer Terra, Pluto

Post contributed by Dr. Roodra Manogaran, Department of Geology and Geophysics, Louisiana State University – LSU blog post Pits are geomorphological features observed on planetary bodies acro…

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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 02/04/2026

The April Planetary Geomorphology Image 📸 of the Month is now online! Dr. @spidrwoman.bsky.social shares her research about lake stars. On Earth, these features develop when water flows through snow or ice on frozen lakes. On the moon Europa, they might reveal the presence of liquid water🧑‍🚀⭐💧

planetarygeomorphology.wordpress.com

Lake Stars as an Earth Analog for Europa’s Manannán Crater Spider Feature

Post contributed by Dr. Lauren Mc Keown, Department of Physics, University of Central Florida – spidrwoman Jupiter’s icy moon Europa is an ocean world that is a prime candidate in our search …

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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

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

The first #Planetary Geomorphology Image 📸 of the Month of 2026 is now online! We started the year by looking at lobate forms around impact craters across the solar system 🪐🌕🧑‍🚀, under the guidance of Alistair Blance from the @openuniversity.bsky.social - #Moon #Mars #Ceres #Mercury

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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 …

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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 …

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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…

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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 20/06/2025

The IAG #Planetary Gemorphology Image of the Month 📸 for June has been online for some time now! PhD candidate JohnPaul Sleiman & Dr. Rachel Glade share some very exciting finds on lobate shapes on the hillslopes of #Mars! planetarygeomorphology.wordpress.com/2025/05/30/l...

planetarygeomorphology.wordpress.com

Lobate Patterns on Slopes in Mars’ Northern hemisphere

Post contributed by JohnPaul Sleiman (PhD Candidate) and Dr. Rachel Glade at Department of Earth and Environmental Sciences, University of Rochester, USA Walk along a periglacial hillside in Norway…

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

The IAG #Planetary Gemorphology Image of the Month 📸 for May is now available. PhD candidate Marie Azevedo explains how the layers of different types of dusty ice deposits in Louth crater on #Mars tell us a story about the past. planetarygeomorphology.wordpress.com/2025/05/01/k...

The image shows a circular (white) water ice deposit in a crater on Mars, which is around 12 km in diameter. The surrounding area outside of the crater is yellow in colour. In the upper left corner of the circular ice deposit a darker patch (dark grey) is visible. This patch contains dunes. In lower right half of the ice deposit layers can be recognized by faint, slightly grey lines.

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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...

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

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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 01/02/2025

This account represents the Planetary Geomorphology working group within the International Association of Geomorphologist. Our blog is a platform for planetary scientists, who study planetary surfaces, to share their research with a wider audience.

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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 01/02/2025

More beautiful images of clouds can be found in the blog post! Follow us for monthly "out of this world" images and posts 🪐🌑👩‍🚀👨‍🔬🛰️

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planetarygeomorph.bsky.social @planetarygeomorph.bsky.social · 01/02/2025

The IAG #Planetary Gemorphology Image of the Month 📸 for February is now available. Dr. Määttänen, Dr. Tirsch and Dr. @jorgehb.bsky.social show us the wonderful variety in clouds on Mars ☁️🌤️🌪️ planetarygeomorphology.wordpress.com/2025/02/01/a...

Two images of clouds on Mars. Left image: clouds and dust at the Northern Polar Region of Mars during the local spring (HRSC image). Right image: clouds and dust at the Northern Polar Region of Mars during the local winter (VMC image). The left panel shows a textured spiral dust storm (brownish) mixed with water ice clouds (bright white) (indicated by arrows). The right panel shows the North Polar Hood, a large scale water ice cloud system.

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