气候变化领域集成服务门户(CCPortal): Abraded pyroclastic linear paleodunes in Syria and Daedalia Plana, Mars

CCPortal

DOI	10.1016/j.epsl.2020.116719
	Abraded pyroclastic linear paleodunes in Syria and Daedalia Plana, Mars
	Runyon K.D.; Viviano C.E.; Day M.
发表日期	2021
ISSN	0012821X
卷号	557
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.
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
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203275
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
推荐引用方式 GB/T 7714	Runyon K.D.,Viviano C.E.,Day M.. Abraded pyroclastic linear paleodunes in Syria and Daedalia Plana, Mars[J],2021,557.
APA	Runyon K.D.,Viviano C.E.,&Day M..(2021).Abraded pyroclastic linear paleodunes in Syria and Daedalia Plana, Mars.Earth and Planetary Science Letters,557.
MLA	Runyon K.D.,et al."Abraded pyroclastic linear paleodunes in Syria and Daedalia Plana, Mars".Earth and Planetary Science Letters 557(2021).