globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116719
论文题名:
Abraded pyroclastic linear paleodunes in Syria and Daedalia Plana, Mars
作者: Runyon K.D.; Viviano C.E.; Day M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 557
语种: 英语
中文关键词: aeolian ; dunes ; geomorphology ; Mars ; pyroclastics ; yardangs
英文关键词: Deposition ; Dust ; Erosion ; Sediment transport ; Textures ; Volcanoes ; Dust deposits ; Most likely ; Pyroclastics ; Reflectance spectrum ; Sediment deposition ; Sediment supply ; Surface of Mars ; Volcanic ash ; Morphology ; deposition ; dune ; eolian process ; erosion ; geomorphology ; Mars ; pyroclastic deposit ; Syrian Arab Republic
英文摘要: In the aeolian-dominated conditions of modern Mars, wind-driven sediment deposition and erosion produce a wide range of enigmatic landforms on the planet's surface. In this work, we explore a widespread occurrence of paleodunes on the surface of Mars. These fossilized bedforms preserve morphologies consistent with transverse dunes, implying an approximately unimodal ancient sediment transport azimuth and abundant sediment supply. These bedforms have previously been interpreted as layered dust deposits, and their bland, dust-like reflectance spectra are consistent with volcanic ash. Additionally, these paleodunes have undergone induration and have been significantly eroded by recent winds, causing a superimposed yardang-like erosional texture on the older dune morphology. We propose that these unusual bedforms most likely occurred as wind-mobilized pyroclastics that welded or were cemented in place after deposition and have since eroded into a field of hybrid paleobedform/proto-yardangs. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165653
Appears in Collections:气候变化与战略

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作者单位: Johns Hopkins University Applied Physics Laboratory, 11101 Johns Hopkins Rd., Laurel, MD 20723, United States; University of California, Los Angeles, Department of Earth, Planetary, and Space Sciences, 595 Charles Young Drive East, Los Angeles, CA 90095, United States

Recommended Citation:
Runyon K.D.,Viviano C.E.,Day M.. Abraded pyroclastic linear paleodunes in Syria and Daedalia Plana, Mars[J]. Earth and Planetary Science Letters,2021-01-01,557
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