Numerical chronology of Pleistocene coastal plain and valley development; extensive aggradation during glacial low sea-levels

Otvos, Ervin G.

doi:10.1016/j.quaint.2004.10.026

Cited by 44 publications

(51 citation statements)

References 82 publications

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“…1a and d). Otvos (2004Otvos ( , 2005 interpreted this aeolian sandsheet and superjacent dunes to have been deposited when sea level was lower than present and distant from the present Gulf coast. Inland aeolian-sand deposits, including dunes, characterize the sink-hole lakes region on Florida's central ridge (White, 1958;Fig.…”

Section: Eastern Gulf Coastal Plain (Egcp)mentioning

confidence: 97%

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Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Markewich

Litwin

Wysocki³

et al. 2015

Aeolian Research

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Section: Eastern Gulf Coastal Plain (Egcp)mentioning

confidence: 97%

“…DEM generated from 1-point 4 m 2 LiDAR Geodatabase Terrain Surface (National Oceanic and Atmospheric Administration, 2006). emergent (Otvos, 2004(Otvos, , 2005. The 44.3-27.7, 25.5-19.8, and 17.5-11.9 ka periods of aeolian activity (Figs.…”

Section: Northeastern Gulf Coast Alabama (Al) and Florida (Fl)mentioning

confidence: 98%

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Markewich

Litwin

Wysocki³

et al. 2015

Aeolian Research

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“…The oldest and highest is the Beaumont terrace, into which the study rivers began incising about 100 ka (Thomas and Anderson, 1994;Blum et al, 1995;Otvos, 2005). Below the Beaumont surface and often merging into the modern floodplain are a series of up to three alluvial terraces.…”

Section: Study Areamentioning

confidence: 99%

“…The uppermost portions of the studied Brazos, Navasota and Neches reaches are in Tertiary coastal and marine formations, but otherwise the entire study area is in Quaternary material. Recent reviews and syntheses of the Quaternary geological framework and sea-level history of the region (and some of the controversies pertaining thereto) are provided by Blum et al (2002) and Otvos (2005). Recent research on the role of antecedent topography and recent geological and sea-level history on current forms, processes and evolution are given for the Brazos River by Sylvia and Galloway (2006), Phillips (2007), Taha (2007) and Taha and Anderson (2008); for the Navasota by Phillips (2007); for the Trinity by Rodriguez et al (2005) and Phillips and Slattery (2008); and for the Sabine by Phillips (in press).…”

Section: Study Areamentioning

confidence: 99%

Avulsion regimes in southeast Texas rivers

Phillips

2008

Earth Surf Processes Landf

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Avulsions -relatively sudden changes in course, or establishment of new anabranches -are an important process in alluvial rivers. Their key role in floodplain construction and alluvial architecture, and the general conditions favouring avulsions, are well known. However, avulsion processes and evolution, and the factors controlling avulsion regimes, are poorly understood. In the southeast Texas coastal plain, where avulsions are common features of the river valleys, avulsions were studied on the lower Brazos, Navasota, Trinity, Neches and Sabine rivers using a combination of aerial imagery, digital elevation models and field surveys. Avulsions have important influences on the surface morphology and contemporary processes in all five rivers. Features associated with avulsions are active and distinct throughout the study area, and all the rivers have experienced geologically (if not historically) recent avulsions. However, no two of the study rivers have the same contemporary avulsion regime. First-order differences in avulsion style are controlled by the stage of valley filling, and within the three rivers characterized by an unfilled incised valley, antecedent morphology associated with late Quaternary and Holocene coastal and fluvial-deltaic processes accounts for the major differences. In the Navasota (27 avulsions in 185 km) and Neches (21 in 340 km) rivers, subchannels associated with avulsions exist in all stages of development from active to infilled, and some have occurred in recent decades. The other rivers have fewer avulsions, but both the Sabine and Trinity have experienced historic channel shifts. Only the Brazos River has experienced no avulsions within the past c. 300 years. Results show that even within a region of similar environmental controls and geological history local variations in inherited morphology can result in different avulsion regimes.

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“…Details of sea-level and Quaternary coastal evolution in Texas are disputed (cf. Blum et al, 2002;Otvos, 2005), but most sources agree that Galveston Bay was formed in roughly its current location about 4000 years ago. During lower sea-level stands in the Quaternary, the Trinity and Sabine Rivers cut incised valleys that converged on the present continental shelf.…”

Section: Trinity River and Galveston Baymentioning

confidence: 99%

Antecedent alluvial morphology and sea‐level controls on form‐process transition zones in the lower Trinity river, Texas

Phillips

Slattery

2008

River Research & Apps

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An important aspect of river science and management is the identification of key boundaries, transition zones and hinge points. Such critical areas are likely to be important foci or indicators of the effects of environmental change on river systems. While geological controls on such features are widely recognized in upland streams, inherited or antecedent forms may also be important controls of key transitional points or reaches in alluvial coastal plain rivers. The critical zone of the lower Trinity River, Texas marks an important transition in river channel and valley forms, dominant processes and resulting geomorphological, hydrological and ecological characteristics. Its location is not a transient result of upstream or downstream propagation of effects. Rather, the location marks the contemporary upstream extent of the effects of Holocene sea-level rise, which in turn coincides with the point at which the Pleistocene upper Deweyville alluvial terrace surface is encountered. A more rapid rate of change and relatively sudden upstream displacement of this zone is likely when the upper Deweyville surface is flooded. Antecedent fluvial and alluvial topography inherited from previous aggradation, degradation and lateral migration episodes is likely to be an important control over modern fluvial forms and processes in other alluvial coastal plain rivers as well. Identification and mapping of such features may be extremely useful in pinpointing critical transition zones for water resource managers.

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Numerical chronology of Pleistocene coastal plain and valley development; extensive aggradation during glacial low sea-levels

Cited by 44 publications

References 82 publications

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Avulsion regimes in southeast Texas rivers

Antecedent alluvial morphology and sea‐level controls on form‐process transition zones in the lower Trinity river, Texas

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