{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,5]],"date-time":"2026-04-05T04:11:54Z","timestamp":1775362314411,"version":"3.50.1"},"reference-count":67,"publisher":"American Geophysical Union (AGU)","issue":"2","license":[{"start":{"date-parts":[[2018,2,8]],"date-time":"2018-02-08T00:00:00Z","timestamp":1518048000000},"content-version":"vor","delay-in-days":7,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000104","name":"National Aeronautics and Space Administration","doi-asserted-by":"publisher","award":["NNH14ZDA001N"],"award-info":[{"award-number":["NNH14ZDA001N"]}],"id":[{"id":"10.13039\/100000104","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JGR Planets"],"published-print":{"date-parts":[[2018,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Isolated landscapes largely shaped by aeolian processes can occur on Earth, while the majority of Mars' recent history has been dominated by wind\u2010driven activity. Resultantly, Martian landscapes often exhibit large\u2010scale aeolian features, including yardang landforms carved from sedimentary\u2010layered deposits. High\u2010resolution orbital monitoring has revealed that persistent bedform activity is occurring with dune and ripple migration implying ongoing abrasion of the surface. However, little is known about the interaction between dunes and the topography surrounding them. Here we explore dune\u2010yardang interactions in Becquerel crater in an effort to better understand local landscape evolution. Dunes there occur on the north and south sides of a 700\u00a0m tall sedimentary deposit, which displays numerous superposed yardangs. Dune and yardang orientations are congruent, suggesting that they both were formed under a predominantly northerly wind regime. Migration rates and sediment fluxes decrease as dunes approach the deposit and begin to increase again downwind of the deposit where the effect of topographic sheltering decreases. Estimated sand abrasion rates (16\u201340\u00a0\u03bcm\u00a0yr<jats:sup>\u22121<\/jats:sup>) would yield a formation time of 1.8\u20134.5\u00a0Myr for the 70\u00a0m deep yardangs. This evidence for local aeolian abrasion also helps explain the young exposure ages of deposit surfaces, as estimated by the crater size\u2010frequency distribution. Comparisons to terrestrial dune activity and yardang development begin to place constraints on yardang formation times for both Earth and Mars. These results provide insight into the complexities of sediment transport on uneven terrain and are compelling examples of contemporary aeolian\u2010driven landscape evolution on Mars.<\/jats:p>","DOI":"10.1002\/2017je005465","type":"journal-article","created":{"date-parts":[[2018,1,10]],"date-time":"2018-01-10T13:14:23Z","timestamp":1515590063000},"page":"353-368","source":"Crossref","is-referenced-by-count":26,"title":["Dune\u2010Yardang Interactions in Becquerel Crater, Mars"],"prefix":"10.1029","volume":"123","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2251-0226","authenticated-orcid":false,"given":"Anna","family":"Urso","sequence":"first","affiliation":[{"name":"Lunar and Planetary Laboratory University of Arizona  Tucson AZ USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8497-8994","authenticated-orcid":false,"given":"Matthew","family":"Chojnacki","sequence":"additional","affiliation":[{"name":"Lunar and Planetary Laboratory University of Arizona  Tucson AZ USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3583-2267","authenticated-orcid":false,"given":"David A.","family":"Vaz","sequence":"additional","affiliation":[{"name":"INAF, Istituto Nazionale di Astrofisica Osservatorio Astronomico di Teramo  Teramo Italy"},{"name":"Centre for Earth and Space Research of the University of Coimbra Observat\u00f3rio Geof\u00edsico e Astron\u00f3mico da Universidade de Coimbra  Coimbra Portugal"}]}],"member":"13","published-online":{"date-parts":[[2018,2,8]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1029\/2009JE003485"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2005.01.005"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/grl.50586"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/2015GL064477"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511536076.008"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1130\/GSAB-45-159"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.geomorph.2006.04.023"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature11022"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1130\/G32373.1"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1002\/2013JE004579"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.geomorph.2007.12.014"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2015.10.022"},{"key":"e_1_2_7_14_1","doi-asserted-by":"publisher","DOI":"10.1029\/2011JF002260"},{"key":"e_1_2_7_15_1","doi-asserted-by":"publisher","DOI":"10.1029\/2010JE003675"},{"key":"e_1_2_7_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2014.01.011"},{"key":"e_1_2_7_17_1","doi-asserted-by":"publisher","DOI":"10.1029\/2009GL042263"},{"key":"e_1_2_7_18_1","unstructured":"Chojnacki M. Urso A. C. Banks M. E. Tornabene L. L. &Bridges N. T.(2017).Sand flux estimates and Aeolian\u2010driven landscape evolution on Mars (Abstract 2627). Presented at the 48th Lunar and Planetary Science Conference Houston: Lunar and Planetary Institute. Retrieved fromhttp:\/\/www.lpi.usra.edu\/meetings\/lpsc2017\/pdf\/2627.pdf"},{"key":"e_1_2_7_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aeolia.2016.07.004"},{"key":"e_1_2_7_20_1","unstructured":"Christensen P. Engle E. Anwar S. Dickenshield S. Noss D. &Weiss\u2010Malik M.(2009).JMARS\u2014A planetary GIS (Vol. AGU IN22A\u201006). 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Kilgallon A. &Team H.(2015).Precision and accuracy of simultaneously collected HiRISE digital terrain models (Abstract 3010). Presented at the 46th Lunar and Planetary Science Conference Houston: Lunar and Planetary Institute. 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