Active fault motion in a coastal wetland: Matagorda, Texas

Feagin, Rusty A.; Yeager, Kevin M.; Brunner, Charlotte A; Paine, Jeffrey G.

doi:10.1016/j.geomorph.2012.08.013

Cited by 15 publications

(15 citation statements)

References 47 publications

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“…Given the control of sediment loading on fault activity in passive margins, fault throw rates may increase with expanding load thickness in the central portions of large depocentres (Heller et al, 2001). Thus, fault related subsidence and associated land loss may be expected in relatively large depocentres, such as the Holocene Mississippi Delta (Armstrong et al, 2014) and the Colorado Delta (Feagin et al, 2013). This issue may be particularly important near the modern Mississippi River depocenter where up to 120 m of Holocene sediments have accumulated ( Fig.…”

Section: Discussionmentioning

confidence: 99%

Mechanisms of late Quaternary fault throw‐rate variability along the north central Gulf of Mexico coast: implications for coastal subsidence

et al. 2016

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Quaternary sea‐level cycles have caused dramatic depocentre shifts near the mouths of major rivers. The effects of these shifts on fault activity in passive margin settings is poorly known, as no studies have constrained passive margin fault throw‐rate variability over 103 to 105 year time scales. Here we present 11 mean throw rates for the Tepetate–Baton Rouge fault zone along the northern Gulf of Mexico coast in southern Louisiana. These data were obtained by optically stimulated luminescence dating over time scales spanning the last interglacial to the late Holocene. The mean throw rate is ca. 0.22 mm year−1 during the late Holocene, ca. 0.03 mm year−1 during the last glacial and at least 0.07 mm year−1 during the last interglacial. Throw rates averaged over the late Pleistocene to present are spatially uniform within our study area. The temporal variability in throw rates suggests that shifts of the Mississippi River depocentre relative to this fault zone, driven by Quaternary sea‐level cycles, may have imposed a significant control on fault activity. The late Holocene throw rate is at least in the order of magnitude smaller than the rates of land‐surface subsidence in the Mississippi Delta, indicating that this fault zone is not a dominant contributor to subsidence in this region.

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Section: Discussionmentioning

confidence: 99%

Mechanisms of late Quaternary fault throw‐rate variability along the north central Gulf of Mexico coast: implications for coastal subsidence

et al. 2016

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“…Recent studies have focused mainly on the Baton Rouge Fault Zone in Louisiana, with reported time-averaged slip rates of 0.2 to 1.2 mm/yr over the past ~4,000 years, although rates averaged over longer timescales (~30,000 to 130,000 years ago) are an order of magnitude lower (Yeager et al, 2012;Shen et al, 2017). An example of relatively recent fault activity, with maximum throw estimated at 75 cm over 40-50 years, was reported from a coastal wetland setting in central Texas (Feagin et al, 2013).The understanding of recent faulting in the region is an area of emerging research.…”

Section: Subsidencementioning

confidence: 99%

Understanding the Long-Term Evolution of the Coupled Natural-Human Coastal System: The Future of the U.S. Gulf Coast

Glickson¹,

Özkan-Haller²,

Carter³

et al. 2018

Geological Society of America Abstracts With Programs

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Division), and Eric White (The Water Institute of the Gulf). The committee would also like to thank Brad Murray of Duke University, who provided information to the committee via a webinar. This Consensus Study Report was reviewed in draft form by individuals chosen for their diverse perspectives and technical expertise. The purpose of this independent review is to provide candid and critical comments that will assist the National Academies of Sciences, Engineering, and Medicine in making each published report as sound as possible and to ensure that it meets the institutional standards for quality, objectivity, evidence, and responsiveness to the study charge. The review comments and draft manuscript remain confidential to protect the integrity of the deliberative process. We thank the following individuals for their review of this report:

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“…3 neotectonics) ought to be included as a factor as well; in combination with the other parameters, it may cause changes in the sedimentation rates, result in the creation of new geomorphological features (spits, dunes, cheniers, marshes, levees, alluvial soils), sea-level oscillations (Kennedy, 2011;Yeager et al, 2012;Feagín et al, 2013) and associated tsunami and storm inundation (Morton et al, 2007;Nichol et al, 2007). The subsidence lowers tidal salt-marshes and fertile lowlands below the level of the sea, which thereafter deposits layers of sediments on the former sub-aerial surfaces until fresh alluvial sedimentation overrides these layers, only to be buried below sea level in the next subsidence cycle (Bolt, 2003).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…In North America, for instance, cycles of subsidence of the coastline have been reconstructed in connection with the punctuated downward movement of the North American plate vis-à-vis the Pacific plate in the Cascadian subduction zone (Nelson et al, 2006;Shennan et al, 2006). Across the Western hemisphere, in the Gulf of Mexico, active fault motion has been suggested as a prime mover of the recent evolution of the coastline (Yeager et al, 2012;Feagín et al, 2013).…”

Section: The Mediterranean Basin Presents Numerous Examples Of Neo-tementioning

confidence: 99%

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The role of neo-tectonics in the sedimentary infilling and geomorphological evolution of the Guadalquivir estuary (Gulf of Cadiz, SW Spain) during the Holocene

et al. 2014

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Active fault motion in a coastal wetland: Matagorda, Texas

Cited by 15 publications

References 47 publications

Mechanisms of late Quaternary fault throw‐rate variability along the north central Gulf of Mexico coast: implications for coastal subsidence

Mechanisms of late Quaternary fault throw‐rate variability along the north central Gulf of Mexico coast: implications for coastal subsidence

Understanding the Long-Term Evolution of the Coupled Natural-Human Coastal System: The Future of the U.S. Gulf Coast

The role of neo-tectonics in the sedimentary infilling and geomorphological evolution of the Guadalquivir estuary (Gulf of Cadiz, SW Spain) during the Holocene

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