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Accumulation and erosion of Mars' south polar layered deposits |
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| Authors: | Seu Roberto Phillips Roger J Alberti Giovanni Biccari Daniela Bonaventura Francesco Bortone Marco Calabrese Diego Campbell Bruce A Cartacci Marco Carter Lynn M Catallo Claudio Croce Anna Croci Renato Cutigni Marco Di Placido Antonio Dinardo Salvatore Federico Costanzo Flamini Enrico Fois Franco Frigeri Alessandro Fuga Oreste Giacomoni Emanuele Gim Yonggyu Guelfi Mauro Holt John W Kofman Wlodek Leuschen Carlton J Marinangeli Lucia Marras Paolo Masdea Arturo Mattei Stefania Mecozzi Riccardo Milkovich Sarah M Morlupi Antonio Mouginot Jérémie Orosei Roberto Papa Claudio Paternò Tobia |
| Institution: | Dipartimento INFOCOM, Università di Roma "La Sapienza," I-00184 Rome, Italy. roberto.seu@uniroma1.it |
| Abstract: | Mars' polar regions are covered with ice-rich layered deposits that potentially contain a record of climate variations. The sounding radar SHARAD on the Mars Reconnaissance Orbiter mapped detailed subsurface stratigraphy in the Promethei Lingula region of the south polar plateau, Planum Australe. Radar reflections interpreted as layers are correlated across adjacent orbits and are continuous for up to 150 kilometers along spacecraft orbital tracks. The reflectors are often separated into discrete reflector sequences, and strong echoes are seen as deep as 1 kilometer. In some cases, the sequences are dipping with respect to each other, suggesting an interdepositional period of erosion. In Australe Sulci, layers are exhumed, indicating recent erosion. |
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