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Accumulation and erosion of Mars' south polar layered deposits

Roberto Seu 1 Roger Phillips 2 Giovanni Alberti 3 Daniela Biccari 1 Francesco Bonaventura 4 Marco Bortone 3 Diego Calabrese 5 Bruce A. Campbell 6 Marco Cartacci 1 Lynn M. Carter 6 Claudio Catallo 5 Anna Croce 5 Renato Croci 5 Marco Cutigni 1 Antonio Di Placido 4 Salvatore Dinardo 3 Costanzo Federico 7 Enrico Flamini 8 Franco Fois 5 Alessandro Frigeri 7 Oreste Fuga 1 Emanuele Giacomoni 1 Y. Gim 9 Mauro Guelfi 5 John W. Holt 10 Wlodek Kofman 11 Carlton Leuschen 12 L. Marinangeli 13 Paolo Marras 4 Arturo Masdea 1 Stefania Mattei 3 Riccardo Mecozzi 5 S. Milkovich 9 Antonio Morlupi 4 Jeremie Mouginot 11 R. Orosei 14 Claudio Papa 3 Tobia Paterno 4 Paolo Persi del Marmo 1 Elena Pettinelli 15 Giulia Pica 3 Giovanni Picardi 1 Jeffrey Plaut 9 Marco Provenziani 1 Nathaniel E. Putzig 2 Federica Russo 1 Ali Safaeinili 9 Giuseppe Salzillo 3 Maria Rosaria Santovito 3 Suzanne E. Smrekar 9 Barbara Tattarletti 4 Danilo Vicari 4
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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Roberto Seu, Roger Phillips, Giovanni Alberti, Daniela Biccari, Francesco Bonaventura, et al.. Accumulation and erosion of Mars' south polar layered deposits. Science, American Association for the Advancement of Science, 2007, 317 (5845), pp.1715-1718. ⟨10.1126/science.1144120⟩. ⟨insu-00359644⟩

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