The Evolution of Ancient Fluvial Systems in Memnonia Sulci, Mars: Impact Crater Damming, Aggradation, and a Large Water Body on the Dichotomy?

Davis, J. M.; Aranos, Liliana; Dickeson, Zachary I; Fawdon, P.

doi:10.1029/2021je007021

Cited by 2 publications

(1 citation statement)

References 81 publications

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“…For fan‐shaped deposits along the Mars dichotomy boundary, these different formation scenarios evoke dramatically different water volumes. Studies interpreting these deposits as deltas have suggested that they debouched into paleolake basins (Davis et al., 2022; Rivera‐Hernández & Palucis, 2019) or a hemisphere‐spanning ocean (De Toffoli et al., 2021). Questions remain, however, for the origin of the largest fan‐shaped deposit along the dichotomy boundary, located at the terminus of Hypanis Valles near the Chryse escarpment (11.2° N, 45.5° W; Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

Effect of Standing Water on Formation of Fan‐Shaped Sedimentary Deposits at Hypanis Valles, Mars

Limaye

Adler

Moodie

et al. 2023

Geophysical Research Letters

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Fan-shaped sedimentary deposits are common in the low latitudes of Mars. These features commonly form at breaks in slope associated with the dichotomy between the southern highlands and northern lowlands (Di Achille & Hynek, 2010;Rivera-Hernández & Palucis, 2019) or the transition from crater rims to floors (Kraal et al., 2008;Wilson et al., 2021). Fan-shaped deposits are interpreted as fluvial in origin, similar to valley networks (Hynek et al., 2010), inverted channels and channel belts (Cardenas et al., 2018), and gravel conglomerates (Williams et al., 2013). Among these features, fan-shaped deposits bear particularly strongly on ancient water volume and persistence, because the deposits are shaped by basin boundary conditions (Paola, 2000).On Earth, fluvial processes form fan-shaped deposits in several ways. In arid regions, flows crossing from steep and confined channels to gentler-sloping, unconfined basins lose sediment transport capacity, triggering deposition of typically coarse-grained sediment (Bull, 1977). If the receiving basin lacks standing water, the resulting deposit is typically called an alluvial fan. In cases where similar flows enter a water body, the term fan-delta is used (Nemec & Steel, 1988;van Dijk et al., 2012). Due to their high slopes and coarse sediment loads, fan-deltas are characterized by bedload sediment transport, high Froude numbers and negligible backwater effects upstream of the shoreline (Cui & Parker, 1997;Sun et al., 2002;Whitfield & Elliott, 2011). These characteristics differ from fluvial systems with lower slopes and finer-grained sediment that are typically called deltas. Deltas tend to have significant sediment transport in suspension, low Froude numbers and significant backwater effects

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Section: Introductionmentioning

confidence: 99%

Effect of Standing Water on Formation of Fan‐Shaped Sedimentary Deposits at Hypanis Valles, Mars

Limaye

Adler

Moodie

et al. 2023

Geophysical Research Letters

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Martian paleolake outlet canyons - Evidence for controls on valley network formation

Diamant,

Bahia,

Sefton-Nash

et al. 2024

Icarus

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The Evolution of Ancient Fluvial Systems in Memnonia Sulci, Mars: Impact Crater Damming, Aggradation, and a Large Water Body on the Dichotomy?

Abstract: The geologic record of Mars points to an early history strongly influenced by aqueous processes. This record includes degraded impacts craters, consistent with fluvial erosion (

Cited by 2 publications

References 81 publications

Effect of Standing Water on Formation of Fan‐Shaped Sedimentary Deposits at Hypanis Valles, Mars

Effect of Standing Water on Formation of Fan‐Shaped Sedimentary Deposits at Hypanis Valles, Mars

Martian paleolake outlet canyons - Evidence for controls on valley network formation

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