Search Publications
Mineralogy of recent volcanic plains in the Tharsis region, Mars, and implications for platy-ridged flow composition
Mangold, N.; Gondet, B.; Langevin, Y. +12 more
Volcanism on Mars occurred until recently, but the mineralogy of recent lava plains is poorly known because few regions display fresh outcrops devoid of dust. Using visible and near infrared data of the Mars Express probe, two new volcanic plains in Noctis Labyrinthus have been identified, and the existence of a volcanic plain on the floor of Echu…
Identification of gully debris flow deposits in Protonilus Mensae, Mars: Characterization of a water-bearing, energetic gully-forming process
Head, J. W.; Dickson, J. L.; Fassett, C. I. +3 more
Gullies are a class of geologically recent landform on Mars that show evidence of downslope transport of sedimentary material from recessed alcoves, through incised channels, to distributary fans or aprons. The mechanisms invoked to account for the formation of gullies on Mars range from completely dry, granular flows or landslides, to debris flow…
Melt and collapse of buried water ice: An alternative hypothesis for the formation of chaotic terrains on Mars
Zegers, Tanja E.; Oosthoek, Jelmer H. P.; Schumacher, Sandra +2 more
Chaotic terrains and the associated massive outflow channels are some of the most enigmatic features on Mars. Over hundreds of kilometres of rock units are fractured, tilted, and have subsided, forming chaotic terrain basins (Sharp, 1973). Large quantities of water emanated from these chaotic terrains in short periods of time in the Hesperian epoc…
Formation, erosion and exposure of Early Amazonian dikes, dike swarms and possible subglacial eruptions in the Elysium Rise/Utopia Basin Region, Mars
Head, J. W.; Wilson, L.; Pedersen, G. B. M.
Hundreds of narrow, linear ridge segments are found in the transition zone between the Elysium Rise and the Utopia basin, occurring as both single and multiple ridges. The ridges are distinctive because of their very linear, steep-sided nature, their often sharp ridge crest (which sometimes is fractured), their association with stubby flows, their…
Noachian-Hesperian geologic history of the Echus Chasma and Kasei Valles system on Mars: New data and interpretations
Mangold, Nicolas; van Gasselt, Stephan; Neukum, Gerhard +8 more
New high-resolution datasets have prompted a mapping-based study of the 2500-km-long Echus Chasma and Kasei Valles system that utilizes geomorphic details, stratigraphic relations, and cratering statistics derived from the new datasets. Our results suggest that between the Hesperian and Amazonian Epochs on Mars (3.7 Ga to Recent) the study area wa…
Martian rifts: Structural geology and geophysics
Hauber, Ernst; Grott, Matthias; Kronberg, Peter
Large extensional tectonic surface structures on Mars are investigated on the basis of image and topographic data. These features have lengths of up to 1400 km, typical widths of tens of kilometers, and depths of up to 3000 m. Their structural architecture is characterized by segmentation with changing style, the development of asymmetric basins w…
The Circum-Hellas Volcanic Province, Mars: Assessment of wrinkle-ridged plains
HRSC Co-Investigator Team; Greeley, Ronald; Williams, David A. +3 more
Wrinkle-ridged plains, common on the terrestrial planets, are inferred to form by tectonic deformation of volcanic or sedimentary surfaces. If wrinkle-ridged plains adjacent to volcanic features originated from volcanic activity associated with the features, then the plains should have similar ages to the volcanic features, as well as other morpho…
Morphologic, stratigraphic and morphometric investigations of valley networks in eastern Libya Montes, Mars: Implications for the Noachian/Hesperian climate change
Jaumann, R.; Hiesinger, H.; Erkeling, G. +1 more
"Dendritic valley networks" and broad "longitudinal valleys" are widespread within the eastern Libya Montes region. The morphologic characteristics of the studied dendritic valleys, especially their occurrence at local summits, provide evidence for the initial formation by surface runoff due to atmospheric precipitation whereas the longitudinal va…
Amazonian geologic history of the Echus Chasma and Kasei Valles system on Mars: New data and interpretations
Mangold, Nicolas; van Gasselt, Stephan; Neukum, Gerhard +6 more
New high-resolution datasets have prompted a mapping-based study of the 2500-km-long Echus Chasma and Kasei Valles system that utilizes geomorphic details, stratigraphic relations, and cratering statistics derived from the new datasets. Our results suggest that between the Hesperian and Amazonian Epochs on Mars (3.7 Ga to Recent), the study area w…
Dike indicators in the Hadriaca Patera-Promethei Terra region, Mars
Korteniemi, Jarmo; Raitala, Jouko; Aittola, Marko +4 more
The eastern Hellas basin rim has been highly modified by a multitude of both volcanic and fluvial processes. It is covered by a large part of the Circum-Hellas Volcanic Province, consisting of the volcanic plains of Hesperia Planum and western Promethei Terra, as well as the two central volcanoes Hadriaca and Tyrrhena Patera and their associated l…