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- W2154664013 abstract "Introduction: We describe the geomorphological, mineralogical and thermal characteristics of light-toned layered outcrops (LLOs) in Iani Chaos. In conducting an integrated GIS-based study, we map LLOs at high-resolution, elucidate the LLOs relationship with the chaotic terrain in which they are found, highlight how they may have been affected during the outflow events that formed Ares Valles [1] and work towards clarifying their pre-chaos mode of formation. Data processing: Data from Mars Global Surveyor’s Mars Orbiter Camera and Laser Altimeter (MOC and MOLA), Mars Express’ High Resolution Stereo Camera (HRSC), Mars Odyssey’s Thermal Emission Imaging Spectrometer (THEMIS) and Mars Reconnaissance Orbiter’s Context Imager (CTX) was processed, georeferenced (in a Sinusoidal projection with a meridian of 342◦E) and ingested into ArcGIS. THEMIS IR images were processed using the THEMIS processing web interface at thmproc.asu and subsequently used with HRSC (where available) and 128 pixel degree−1 MOLA topography to derive best-fit thermal-inertia and albedo [2]. Geomorphological description: We mapped lighttoned layered outcrops in Iani Chaos to the scale that data resolution and coverage allowed. The main outcrops are found in depressions, often interspersed with chaotic mounds and are labelled a–d in figure 1. These have been previously mapped by [3] at the scale of Mars Orbital Camera Wide Angle images (∼240m pixel−1). Typically, LLOs in this region show a pitted, fractured texture and have virtually no small craters. Outcrops towards the head of Ares Valles in region b (figure 1) often show directional erosion features and yardangs (parallel wind-formed ridges). They are ∼20–50m in width and adjacent depressions are infilled with a dark material that appears to be wind-blown sand (THEMIS thermal inertia of 300 tiu). HiRISE (PSP 00810" @default.
- W2154664013 created "2016-06-24" @default.
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- W2154664013 date "2010-03-01" @default.
- W2154664013 modified "2023-09-26" @default.
- W2154664013 title "An Integrated Study of Light-toned Layered Outcrops (LLOs) in Iani Chaos." @default.
- W2154664013 hasPublicationYear "2010" @default.
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