Journal
GEOLOGY
Volume 38, Issue 9, Pages 791-794Publisher
GEOLOGICAL SOC AMER, INC
DOI: 10.1130/G31268.1
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Funding
- UK Science and Technology Facilities Council [ST/F003099/1, PP/E00217X/1, PP/E002366/1]
- Royal Society-Leverhulme Trust
- Science and Technology Facilities Council [PP/E002366/1] Funding Source: researchfish
- UK Space Agency [ST/F003099/1] Funding Source: researchfish
- STFC [PP/E002366/1, PP/E00217X/1, ST/F003099/1] Funding Source: UKRI
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We describe the evolution of an similar to 600-m-deep tributary outflow channel to Ares Vallis, Mars. High-resolution topography, image analysis, and crater statistics indicate that this tributary canyon developed by the upstream migration of a large, similar to 300-m-tall cataract during multiple flood events that span similar to 1 b.y. of Mars history (3.7-2.6 Ga). Issuing from Hydapsis Chaos, these floods were initiated at a similar time and occurred over a similar time range to flooding in Ares Vallis, suggesting a potential regional control on flood initiation and chaos formation. In addition, we provide evidence that cataract retreat and significant incision within the tributary canyon occurred only after a series of downcutting events within Ares Vallis. Topography data and crater statistics taken from the floor of Ares Vallis indicate an similar to 300 m base-level drop that coincides temporally with an Early Amazonian (ca. 2.6 Ga) flood event and cataract formation within the tributary canyon. The results both confirm the hypothesis of long-term, multiple flood events within martian outflow channels and demonstrate the influence of base-level change on their incision.
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