Rapid megaflood-triggered base-level rise on Mars
Rapid megaflood-triggered base-level rise on Mars
复制标题
特大洪水引发火星基准面快速上升
作者:
Ahmed J
The existence of ancient fluvial systems on Mars is widely accepted, but little is known about how quickly they formed, or what environmental conditions controlled their evolution. We analyzed a sequence of well-preserved inner-bank bar deposits within the meander bends of a multistacked sinuous fluvial ridge in Aeolis Dorsa and compared them to similar features on Earth to establish the conditions required for their formation. Our results reveal that these Martian channels were highly aggradational, rising an order of magnitude higher than terrestrial rivers. This evolution occurred over very rapid time scales, with our estimates suggesting that some entire inner-bar set deposits, and therefore the aggradational channel, may have formed in less than a single Martian year, with upper bounds of a few decades. We suggest that this unique channel topography was created by a rapidly rising downstream water body, triggered by a sequence of externally sourced megafloods (e.g., crater lake breaches).
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
K. Konsoer;Jessica Z. LeRoy;D. Burr;G. Parker;R. Jacobsen;Dominique Turmel
通讯作者:
Dominique Turmel
影响因子:
5.2
作者:
F. Rivera‐Hernández;M. Palucis
通讯作者:
M. Palucis
影响因子:
2
作者:
P. Durkin;S. Hubbard;R. Boyd;D. Leckie
通讯作者:
P. Durkin;S. Hubbard;R. Boyd;D. Leckie
影响因子:
13.6
作者:
E. Kite;D. Mayer;S. Wilson;Joel M. Davis;A. Lucas;G. Stucky de Quay
通讯作者:
G. Stucky de Quay
影响因子:
3.3
作者:
J. Mason;D. Mohrig
通讯作者:
D. Mohrig