Lava Flow Modification of the Wrinkle Ridges in the Late Amazonian Volcanic Unit on Mars

Lava Flow Modification of the Wrinkle Ridges in the Late Amazonian Volcanic Unit on Mars | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 21 January 2026 V1 Latest version Share on Lava Flow Modification of the Wrinkle Ridges in the Late Amazonian Volcanic Unit on Mars Authors : Jianfei Liu 0009-0008-4663-0995 and Lu Pan 0000-0002-8151-2125 [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.176903352.29785153/v1 109 views 67 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Wrinkle ridges are widespread compressional tectonic features on Mars and are important records of the planet’s global contractional history. However, their formation, evolution and subsequent modification by other geologic processes remain poorly constrained. Combining radar data, elevation data and high-resolution imagery, we find that the uppermost layer of the Late Amazonian volcanic (lAv) unit is ~50 m thick and exhibits dielectric properties consistent with porous basalt (ε=7.50± 0.69; tanδ=0.011-0.077). Stratigraphic analyses and crater dating reveal multiple resurfacing events at ~1.3 Ga, ~240 Ma, and ~28 Ma. The estimated volume of the youngest flow is ~7.50×107 km3, and flow thicknesses appear to have progressively decreased over time. Radar and image data demonstrate that the latest lava flow completely buried the pre-existing ridges while preserving their subsurface geometry. The burial process can protect ridges from erosion, explaining the higher abundance of wrinkle ridges in volcanic plains. Wrinkle ridges within the lAv unit differ from global averages, showing enhanced widths, lower heights, larger width-to-height ratios, and reduced elevation offsets. These morphometric deviations indicate significant post-formational modification by volcanic flooding, topography inflation and sedimentation. Through analysis of displacement-length ratio, we demonstrate that the modification can lead to an underestimation of derived strain by up to ~22%. These findings reveal that volcanism both alters surface ridge topography and preserves underlying structure, emphasizing the necessity of radar constraints to reconstruct tectonic history on Mars. Supplementary Material File (1059489_0_merged_1767756312.pdf) Download 20.37 MB File (article.pdf) Download 1.90 MB File (supplementary_info.docx) Download 2.87 MB Information & Authors Information Version history V1 Version 1 21 January 2026 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords mars radar resurfacing volcanism wrinkle ridges Authors Affiliations Jianfei Liu 0009-0008-4663-0995 University of Science and Technology of China View all articles by this author Lu Pan 0000-0002-8151-2125 [email protected] University of Science and Technology of China View all articles by this author Funding Information National Natural Science Foundation of China 42521007 Lu Pan Metrics & Citations Metrics Article Usage 109 views 67 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Jianfei Liu, Lu Pan. Lava Flow Modification of the Wrinkle Ridges in the Late Amazonian Volcanic Unit on Mars. Authorea . 21 January 2026. DOI: https://doi.org/10.22541/au.176903352.29785153/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. 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