globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50778
论文题名:
Formation of double-layered ejecta craters on Mars: A glacial substrate model
作者: Weiss D.K.; Head J.W.
刊名: Geophysical Research Letters
ISSN: 0094-8711
EISSN: 1944-8442
出版年: 2013
卷: 40, 期:15
起始页码: 3819
结束页码: 3824
语种: 英语
英文关键词: DLE formation model ; double-layered ejecta crater ; ice impact ; Mars glaciation ; Mars impact cratering ; Rampart crater
Scopus关键词: double-layered ejecta crater ; Formation model ; Impact cratering ; Mars glaciation ; Rampart crater ; Glacial geology ; Snow ; Ice ; crater ; deposition ; ejecta ; glacial sedimentation ; Mars
英文摘要: A class of Martian impact craters with particularly unusual ejecta characteristics (double-layered ejecta (DLE) craters) are preferentially located in the midlatitudes in both hemispheres of Mars. Unlike today, decameters thick deposits of snow and ice occupied these same latitudes for significant periods during the Amazonian period. We assess the hypothesis that the unusual double-layer morphology could be related to impact into a snow and ice glacial substrate followed by landsliding of ejecta off of the structurally uplifted rim. We find that many characteristics of DLE craters (e.g., latitudinal distribution, lack of secondaries, landslide-like textures, evidence for overthrusting, relation to other crater types, etc.) are consistent with such an origin. © 2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881185875&doi=10.1002%2fgrl.50778&partnerID=40&md5=fc20443ba0a5d11160e906ae656980d0
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5975
Appears in Collections:气候减缓与适应

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作者单位: Department of Geological Sciences, Brown University, 324 Brook Street, Box 1846, Providence, RI 02912, United States

Recommended Citation:
Weiss D.K.,Head J.W.. Formation of double-layered ejecta craters on Mars: A glacial substrate model[J]. Geophysical Research Letters,2013-01-01,40(15).
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