109571 20220208123552.0 doi 10.1016/j.icarus.2020.113680 sideral 116511 ART-2020-116511 eng Parenti, Carlota Closed depressions in Kotido crater, Arabia Terra, Mars. Possible evidence of evaporite dissolution-induced subsidence 2020 The identification of karst sinkholes in Mars may provide evidence of dissolution processes caused by liquid water and information on paleoclimatic and paleohydrological conditions. This work presents a comprehensive cartographic inventory of 513 closed depressions developed on evaporite-bearing Equatorial Layered Deposits (ELDs) within Kotido crater, Arabia Terra. Detailed mapping, morphometric analyses and spatial distribution relationships reveal a number of features supporting that the depressions correspond to collapse sinkholes related to evaporite dissolution: (1) suitable topographic and litho-structural conditions for the development of a fracture-controlled epigene evaporite karst; (2) presence of open fissures at the foot of the scarped margins; (3) dimensions and frequency-size distributions comparable with those reported on Earth; (4) spatial association with high-permeability zones (i.e., fractures). Some characteristics of the depressions indicate that they have been re-shaped and enlarged by wind erosion: (1) dominant orientation consistent with the prevalent one-directional winds; (2) differing morphological characteristics on the downwind- and upwind-sides; and (3) nested depressions associated with the upwind sector. The relatively fresh appearance of the depressions and the lack of impact craters suggest a poorly constrained Amazonian karstification phase in the region. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MINECO/CGL2017-85045-P info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.508 2020 ASTRONOMY & ASTROPHYSICS 26 / 68 = 0.382 2020 Q2 T2 1.524 2020 Space and Planetary Science 2020 Q1 Astronomy and Astrophysics 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Gutiérrez, Francisco Universidad de Zaragoza (orcid)0000-0002-5407-940X Baioni, Davide García-Arnay, Ángel Universidad de Zaragoza (orcid)0000-0002-4899-680X Sevil, Jorge Universidad de Zaragoza (orcid)0000-0002-0068-4532 Luzzi, Erica 2000 427 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Externa 341 (2020), 113680 [14 pp.] Icarus Icarus 0019-1035 1097569 http://zaguan.unizar.es/record/109571/files/texto_completo.pdf Postprint 1239395 http://zaguan.unizar.es/record/109571/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:109571 articulos driver 2022-02-08-11:18:38 ARTICLE