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Landslides on Ceres: Diversity and Geologic Context.

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Most landslides on Ceres exhibit intermediate morphologies, linking their varied characteristics to subsurface ice. This study details these features, enhancing our understanding of Ceres's shallow subsurface and ground ice.

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Area of Science:

  • Planetary geology
  • Geomorphology
  • Remote sensing

Background:

  • Landslides are common geologic features on Ceres.
  • Previous classification categorized landslides into three archetypes: Type 1 (T1), Type 2 (T2), and Type 3 (T3).
  • Most landslides display intermediate characteristics between these archetypes.

Purpose of the Study:

  • To describe the varied morphology of intermediate landslides on Ceres.
  • To identify geologic controls influencing landslide variation.
  • To quantify the physical properties of Ceres's surface flows.

Main Methods:

  • Analysis of data from Dawn's Framing Camera.
  • Geomorphological classification of landslides.
  • Identification of geologic contexts and physical properties.

Main Results:

  • Intermediate landslides exhibit diverse morphologies and occur in various settings, including crater contacts, multiple lobes, and within catenae.
  • Most intermediate landslides resemble Type 2 landslides and result from shallow failures.
  • Distribution and mechanical properties of intermediate landslides are similar to archetypal ones, confirming a link to subsurface ice.

Conclusions:

  • Intermediate landslides are prevalent on Ceres and provide insights into the shallow subsurface and ground ice.
  • The varied morphologies are influenced by geologic context, but mechanical properties link to subsurface ice.
  • Specific crater regions (Juling, Kupalo, Urvara) show clusters suggesting enhanced subsurface ice.