A terrestrial weathering and wind abrasion analog for mound and moat morphology of Gale crater, Mars

被引：5

作者：

Chan, Marjorie A. ^{[1
]}

Netoff, Dennis I. ^{[2
]}

机构：

[1] Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA

[2] Sam Houston State Univ, Dept Geog & Geol, Huntsville, TX 77340 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 09期

关键词：

eolian; Gale crater; Mars; terrestrial analog; intracrater; moat; SEDIMENTARY-ROCKS; SOUTHERN UTAH; DEPOSITS; EVOLUTION; RECORD;

D O I：

10.1002/2017GL072978

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A striking feature of Gale crater is the 5.5km high, central layered mound called Mount Sharp (Aeolis Mons)the major exploration target for the Mars Science Laboratory rover, Curiosity. Within the 154km diameter crater, low plains (Aeolis Palous) resemble a moat surrounding Mount Sharp. There is a similar terrestrial analog in the Jurassic Navajo Sandstone of southern Utah, USA, where a distinctive weathering pit 60m wide by 20m deep contains a central pillar/mound and moat. Strong regional and local winds are funneled to amplify their velocity and produce a Venturi effect that sculpts the pit via wind abrasion. Although the Navajo pit is orders of magnitude smaller than Gale crater, both show comparable morphologies accompanied by erosional wind features. The terrestrial example shows the impact of weathering and the ability of strong winds and vortices to shape lithified sedimentary rock over long periods of time.

引用

页码：4000 / 4007

页数：8

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