Stratigraphy of Tide-Dominated Estuaries

Tessier, Bernadette

doi:10.1007/978-94-007-0123-6_6

Cited by 33 publications

(27 citation statements)

References 48 publications

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“…Other rock bounded estuaries have been described in the northwest of Iberian Península (Evans and Prego, 2003;Naughton et al, 2007), France (e.g. Menier, 2006;Chaumillon et al 2008;Sorrel et al, 2010;Tessier, 2012), United Kingdom and Ireland (Burningham and Cooper, 2004;Cooper, 2006) and South Africa (Cooper, 2001).…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic controls of morpho-sedimentary evolution in a rock-bounded wave dominated estuary. Tina Menor (N Spain)

Flor-Blanco

Flor

González

et al. 2016

Journal of Iberian Geology

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The Tina Menor estuary is a highly confined incised valley with advanced sedimentary infilling. The outstanding feature of this estuary is its longitudinal zonation, which forms four segments from the outer to the inner limit: Mouth complex, Bay, Tidal flats and Upper channel. The innermost part of the Bay and the Tidal Flats (semi-reclaimed areas) are broader estuarine zones, whereas the Mouth Complex and outermost Bay are confined by narrow rocky outcrops. This paper explains the dynamics and sedimentary distribution of a highly confined and singular estuary, detailing the fluvial-tidal controls on the variations in water mixing (QF/QT). This estuary is largely of salt wedge type and the dynamics are characterised by recording currents (speed and direction) in the water column during a tidal cycle in a spring tide; this process consists of the tidal waves propagation and their dissipation upstream hypo-synchronously and the mixing of fresh and saline waters.The morphology, dynamics and sedimentary distributions have been integrated to develop a conceptual model that demonstrates the circulation within the estuary. The sinuous geometry of the estuarine valley and the Coriolis Effect detected, play a fundamental role in determining the morphology and sedimentary distribution. Consequently, this study provides an adequate overview of this type of confined mesotidal estuary, quite common in the eastern Atlantic coast.Keywords: estuary, mesotidal, Bay of Biscay, morpho-sedimentary processes Resumen El estuario de Tina Menor es un valle encajado altamente confinado y sedimentariamente en un avanzado estado de colmatación. Se caracteriza por su zonación longitudinal en cuatro segmentos bien diferenciados desde su sector más externo hasta el límite interior: Complejo de Desembocadura, Bahía, Llanuras Mareales y Canal Superior. El interior de la Bahía y las Llanuras Mareales de carácter fangoso (zonas semi-reclamadas) son las más extensas, mientras que el Complejo de Desembocadura y la parte externa de la Bahía, están estrechamente confinadas por afloramientos rocosos. Este trabajo explica la distribución dinámica y sedimentaria de un estuario singular y altamente confinado, detallando los controles fluviales-mareales en la variación de las mezclas de agua (QF/QT). Este estuario es en gran parte del tipo de cuña salina y la dinámica fue caracterizada por las medidas de corrientes (velocidad y dirección) realizadas en la columna de agua durante un ciclo mareal en marea viva; este proceso consiste en la propagación de las ondas de marea y su disipación de aguas arriba hiposincrónicamente y la mezcla de aguas dulces y salinas.La morfología, dinámica y las distribuciones sedimentarias, se han integrado para desarrollar un modelo conceptual que demuestre la circulación dentro del estuario. La geometría sinuosa del valle estuarino y la detección del efecto de Coriolis, juegan un rol fundamental para determinar la distribución morfologica y sedimentaria. Consecuentemente, este estudio proporciona un visión adecuada de...

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Section: Introductionmentioning

confidence: 99%

Hydrodynamic controls of morpho-sedimentary evolution in a rock-bounded wave dominated estuary. Tina Menor (N Spain)

Flor-Blanco

Flor

González

et al. 2016

Journal of Iberian Geology

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“…The rhythmites mostly lack marine fossils and bioturbation is rare, suggesting deposition under stressing environmental conditions, which is consistent with brackish waters and high sedimentation rates with high suspended sediment concentrations and minimal bioturbation and wave reworking (e.g., Thomas et al 1987;Tessier and Gigot 1989;Dalrymple et al 1991). The rhythmites are regarded as typical of macrotidal to hypertidal settings (Archer 1995;Tessier 2012), and they are better developed with extreme tidal dynamics within transgressive systems (Archer and Greb 2012).…”

Section: Dynamics and Evolution Of Bahía Punta Fósil Paleochannelmentioning

confidence: 99%

“…The TRS may erode very deep in some macrotidal or hypertidal settings, eventually cutting the transgressive surface (e.g., Allen and Posamentier 1994) and becoming the main discontinuity within the infill of incised valleys. Furthermore, they may cut the subaerial incision surface in starved estuaries (Chaumillon et al 2010;Tessier 2012). In these tracts, the TRS becomes itself (and is coplanar to) the sequence boundary.…”

Section: Introductionmentioning

confidence: 98%

“…TRSs are formed at the erosional base of tidal channels (Allen and Responsible editor: B.W. Flemming P o s a m e n t i e r 1 9 9 3 ) by upward and backward (retrogradational) migration of the estuarine system Dalrymple et al 1992), and may extend throughout tide-dominated estuaries (Zaitlin et al 1994;Tessier 2012). The depth of tidal ravinement is related to the tidal range and current energy in tidal channels within tidally dominated estuaries.…”

Section: Introductionmentioning

confidence: 99%

“…Conversely, they can be traced and correlated to discontinuities with high-resolution seismic techniques in the subsurface (e.g., Ashley and Sheridan 1994;Maynard et al 2010) where direct observation of the sedimentary rocks is limited. The potential for preservation of estuarine sedimentary bodies is primarily controlled by tidal accommodation, defined by the depth of the main tidal channel belt (Tessier 2012).…”

Section: Introductionmentioning

confidence: 99%

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Sequential development of tidal ravinement surfaces in macro- to hypertidal estuaries with high volcaniclastic input: the Miocene Puerto Madryn Formation (Patagonia, Argentina)

Scasso

Cuitiño

2016

Geo-Mar Lett

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The late Miocene beds of the Puerto Madryn Formation (Provincia del Chubut, Argentina) are formed by shallow marine and estuarine sediments. The latter include several tidal-channel infills well exposed on the cliffy coast of the Peninsula Valdés. The Bahía Punta Fósil and Cerro Olazábal paleochannels are end members of these tidal channels and show a fining-upward infilling starting with intraformational channel lag conglomerates above deeply erosional surfaces interpreted as fluvial ravinement surfaces (the erosion surface formed in the purely fluvial or the fluvially dominated part of the estuary, where erosion is driven by fluvial processes). These are overlain and eventually truncated (and suppressed) by the tidal ravinement surface (TRS), in turn covered with high-energy, bioclastic conglomerates mostly formed in the Btidally dominated/fluvially influenced^part of an estuary. Above, large straight or arcuate point bars with alternatively sandy/muddy seasonal beds and varying trace and body fossil contents were deposited from the freshwater fluvially dominated to saline-water tidally dominated part of the estuary. The upper channel infill is formed by cross-bedded sands with mud drapes and seaward-directed paleocurrents, together with barren, volcaniclastic sandy to muddy heterolithic seasonal rhythmites, both deposited in the fluvially dominated part of the estuary. Volcanic ash driven by the rivers after large explosive volcanic eruptions on land resulted in sedimentation rates as high as 0.9 m per year, preserving (through burial) the morphology of tidal channels and TRSs. The channel deposits were formed in a tide-dominated, macrotidal to hypertidal open estuary with welldeveloped TRSs resulting from strong tidal currents deeply scouring into the transgressive filling of the channels and eventually cutting the fluvial ravinement surface. The TRSs extended upstream to the inner part of the estuary during long periods of low sedimentation rates, extended channel migration and sediment bypass, interrupted by transient, high volcaniclastic input. The tidal channels of the Puerto Madryn Formation constitute a unique example of estuary sedimentation with pulsed sediment supply in a macrotidal to hypertidal estuary.

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Depositional dynamics and sequence development in a tidally influenced marginal marine basin

Ahokas

Nystuen

Martinius

2014

From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin

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Stratigraphy of Tide-Dominated Estuaries

Cited by 33 publications

References 48 publications

Hydrodynamic controls of morpho-sedimentary evolution in a rock-bounded wave dominated estuary. Tina Menor (N Spain)

Hydrodynamic controls of morpho-sedimentary evolution in a rock-bounded wave dominated estuary. Tina Menor (N Spain)

Sequential development of tidal ravinement surfaces in macro- to hypertidal estuaries with high volcaniclastic input: the Miocene Puerto Madryn Formation (Patagonia, Argentina)

Depositional dynamics and sequence development in a tidally influenced marginal marine basin

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