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Athabasca Valles, Mars: A lava-draped channel system

Science

By:
, , , ,
DOI: 10.1126/science.1143315

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Abstract

Athabasca Valles is a young outflow channel system on Mars that may have been carved by catastrophic water floods. However, images acquired by the High-Resolution Imaging Science Experiment camera onboard the Mars Reconnaissance Orbiter spacecraft reveal that Athabasca Valles is now entirely draped by a thin layer of solidified lava - the remnant of a once-swollen river of molten rock. The lava erupted from a fissure, inundated the channels, and drained downstream in geologically recent times. Purported ice features in Athabasca Valles and its distal basin, Cerberus Palus, are actually composed of this lava. Similar volcanic processes may have operated in other ostensibly fluvial channels, which could explain in part why the landers sent to investigate sites of ancient flooding on Mars have predominantly found lava at the surface instead.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Athabasca Valles, Mars: A lava-draped channel system
Series title:
Science
DOI:
10.1126/science.1143315
Volume
317
Issue:
5845
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1709
Last page:
1711
Number of Pages:
3