Building the Ridge of Iapetus: Modeling an In-Falling Ring

Details Building the Ridge of Iapetus: Modeling an In-Falling Ring Building the Ridge of Iapetus: Modeling an In-Falling Ring

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1527w&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1527

Computer Science

Scientific paper

The ridge on Iapetus is a puzzling feature - up to 15 km tall and 100's of km wide; it is challenging to reconcile with the global history of Iapetus. The most commonly proposed exogenic cause of this feature is the build up of in-falling material from a ring, or disk, of orbiting material [1, 2]. However no detailed modeling exists for which a comparison can be made against the known features of the Iapetan ridge. The constraining features of the Iapetan ridge are: general dimensions, morphology/slopes, possibility for incomplete coverage and some localised cases of parallel ridges or tracks. We present granular mechanics simulations of ridge growth from an in-falling ring of debris. The parameters that we have explored are tangential/normal velocity ratios for in-falling debris, in-falling ring thickness (inclination), and the effects of pre-existing terrain and/or global shape inequalities.

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