The infralittoral prograding wedge: a new large-scale progradational sedimentary body in shallow marine environments

Hernández-Molina, F. Javier; Fernández-Salas, L.M.; Lobo, F. J.; Somoza, Luı́s; Díaz‐del‐Río, V.; Dias, João Alveirinho

doi:10.1007/s003670000040

Cited by 146 publications

(118 citation statements)

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“…6900-6500 y BP; Díaz and Maldonado, 1990;Ercilla et al, 1995;Hernández-Molina et al, 2000), and in the study area it would have developed during its last stages (Figs. 3, 4 and 7). The onlapping seismic facies and backstepping stratal pattern that characterises the lower sequence indicate that it is formed by transgressive sediments deposited during this transgression.…”

Section: Sequence Stratigraphy and Age Modelmentioning

confidence: 97%

“…Studies of infralittoral environments, mainly those dealing with deposits making up the infralittoral wedges (Medialdea et al, 1989) or infralittoral prograding wedges (Hernández-Molina et al, 2000), have focused mainly on their connection with the continental shelf and have mainly addressed sedimentary processes. In recent years there has been increasing interest in infralittoral environment studies aimed at improving knowledge of aspects that may be important for the future of coastal communities, such as the exploitation of offshore resources, corridors for communication and transport, fishing habitat protection, preservation of wetlands, and protection of coastal communities from natural and anthropogenic hazards.…”

Section: Introductionmentioning

confidence: 99%

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The El Masnou infralittoral sedimentary environment (Barcelona province, NW Mediterranean Sea): morphology and Holocene seismic stratigraphy

Ercilla¹,

Estrada²,

Casas³

et al. 2009

Sci. Mar.

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SUMMARY: A detailed analysis of the morphology and the Holocene seismic and sequence stratigraphy and architecture of the infralittoral sedimentary environment of the El Masnou coast (Catalonia, NW Mediterranean Sea) was carried out using multibeam bathymetry and GeoPulse seismic data. This environment extends down to 26-30 m water depth, and is defined morphologically by two depositional wedges whose seafloor is affected by erosive furrows, slides, fields of large-and smallscale wavy bedforms, and dredging trenches and pits. Erosive terraces are also identified in the transition domain toward the inner continental shelf. The Holocene stratigraphy of the infralittoral environment is defined by two major seismic sequences (lower and upper), each one formed by internal seismic units. The sequences and units are characterised by downlapping surfaces made up of deposits formed by progradation of coastal lithosomes. The stratigraphy and stratal architecture, displaying a retrogradational arrangement with progradational patterns of minor order, were controlled by different sea-level positions. The stratigraphic division represents the coastal response to the last fourth-order transgressive and highstand conditions, modulated by small-scale sea-level oscillations (≈1-2 m) of fith to sixth order. This study also highlights the advantage of an integrated analysis using acoustic/seismic methods for practical assessment of the anthropogenic effects on infralittoral domains based on the association of marine geological observations. Keywords: infralittoral environment, morphology, stratigraphy, Holocene, El Masnou. RESUMEN: El ambiEntE sEdimEntario infralitoral dE El masnou (provincia dE barcElona, mEditErránEo no): morfología y Estratigrafía sísmica dEl HolocEno. -En este trabajo se presenta el estudio detallado de la morfología y la estratigrafía sísmica y secuencial del Holoceno que caracteriza al ambiente infralitoral de El Masnou y que ha sido llevado a cabo mediante datos obtenidos con sonda multihaz y perfiles de sísmica monocanal de alta resolución de GeoPulse. Este ambiente infralitoral se extiende hasta los 26-30 m de profundidad y está morfológicamente caracterizado por dos cuñas deposicionales cuyas superficies están afectadas por surcos erosivos, deslizamientos, campos de ondas de sedimento de pequeña y gran escala, y formas de origen antrópico (fosas y hoyos de dragado). También se identifican terrazas erosivas en el área de transición a la plataforma continental. La estratigrafía del Holoceno de este ambiente infralitoral está definida por dos secuencias sísmicas (inferior y superior), y cada una de ellas comprende internamente unidades sísmicas. El desarrollo de esta estratigrafía y de su arquitectura ha estado controlado por cambios del nivel del mar. Las divisiones estratigráficas definidas representan la respuesta costera al último estadio transgresivo y de alto nivel del mar de 4º orden, modulado por pequeñas oscilaciones (≈1-2 m) de nivel del mar de 5º y 6º orden. Por otra parte, el presente estudio mue...

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Section: Sequence Stratigraphy and Age Modelmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

The El Masnou infralittoral sedimentary environment (Barcelona province, NW Mediterranean Sea): morphology and Holocene seismic stratigraphy

Ercilla¹,

Estrada²,

Casas³

et al. 2009

Sci. Mar.

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“…8; Patruno et al, 2015a). Delta-scale subaqueous clinoforms are subject to efficient basinal transport and sorting: therefore, their facies, grain-size, geomorphology and architecture are all more uniform than in shoreline clinoforms (e.g., near-linear plan-view morphology) (Driscoll and Karner, 1999;Kuehl, 2000a, 2000b;Chen et al, 2000;Hernández-Molina et al, 2000a;Cattaneo et al, 2003Cattaneo et al, , 2007Liu et al, 2004Liu et al, , 2006Liu et al, , 2007bLobo et al, 2005;Qiu et al, 2014;Patruno et al, 2015aPatruno et al, , 2015b.…”

Section: Delta Scale Clinoformsmentioning

confidence: 99%

“…6-7 ka before present, with the waning of the rate of post-glacial eustatic rise (Summerhayes et al, 1978;Field and Roy, 1984;Stanley and Chen, 1996;Morales, 1997;Chen et al, 2000;Stouthamer and Berendsen, 2000;Kuehl, 2000a, 2000b;Hernández-Molina et al, 2000a;Ta et al, 2002a;Hori et al, 2002Hori et al, , 2004Cattaneo et al, 2003Cattaneo et al, , 2007Palinkas and Nittrouer, 2006;Liu et al, 2006Liu et al, , 2007aLiu et al, , 2007bGiosan et al, 2006b;Le Dantec et al, 2010;Qiu et al, 2014).…”

Section: Delta Scale Clinoformsmentioning

confidence: 99%

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Clinoforms and clinoform systems: Review and dynamic classification scheme for shorelines, subaqueous deltas, shelf edges and continental margins

Patruno

Helland‐Hansen

2018

Earth-Science Reviews

171

165

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A B S T R A C TClinoforms are inclined and normally basinward-dipping horizons developed over a range of spatial and temporal scales in both siliciclastic and carbonatic systems. The study of clinoform successions underpins sequence stratigraphy and all efforts to reconstruct the relative partitioning of reservoir, seal and source rocks along shoreline to basin-floor profiles.Here, we review clinoform research and propose a more systematic description and classification of clinoforms. This is a crucial step to improve predictions of facies and lithology distribution within shoreline to continental shelf and abyssal plain successions, together with the genesis, drivers and dynamics of their constituent sedimentary units.Four basic clinoform types are here distinguished in delta/shorelines, lacustrines and marine environments, on the basis of their overall spatial and temporal scale, morphology, outbuilding dynamic and geodynamic and depositional setting: (1, 2) delta-scale clinoforms, which in turns are sub-divided into shoreline and delta-scale subaqueous clinoforms; (3) shelf-edge clinoforms; and (4) continental-margin clinoforms. Delta-scale clinoform sets are tens of metres high and typically represent 1-10 3 kyr, with progradation rates ranging from 1,000-100,000 m/kyr for shorelines and "subaerial deltas" to 100-20,000 m/kyr for subaqueous deltas; shelfedge clinoform sets are hundreds of metres high and are nucleated and accreted in 0.1-20 Myr (usual progradation rates of 1-100 m/kyr) by successive cross-shelf transits of delta-scale clinoforms; continental-margin clinoform sets are thousands of metres high, hallmark key geodynamic/crustal boundaries (e.g., continent/ocean transition) and slowly prograde basinwards in ca. 5-100 Myr, with typical rates of 0.1-10 m/kyr. As a consequence of the very different progradation rates and of the difficulty of large-scale clinothems to backstep during transgressions, shorelines are the most dynamic clinoforms with regards to position, continental margins the least, and shelf-edges are intermediate. Shortly after a transgression, therefore, the four clinoform types may prograde synchronously along shoreline-to-abyssal plain transects, forming "compound clinoform" systems. During the subsequent regressive cycle, however, due to the dissimilarity in progradation rates, different clinoform types will normally merge progressively with each other, giving rise to "hybrid clinoforms" (e.g., shelf-edge deltas), and fewer depositional breaks-in-slope are distinguished along a single shoreline-toabyssal plain transect. Overall, all clinoform systems are the result of the dynamic evolution of compound and hybrid clinoforms along a temporal and spatial continuum, regulated by the cyclical backstepping of the smallerscale system within natural progradational-retrogradational cycles of larger-scale clinothem outbuilding.All clinothem types may show either an accretionary/active or draping/passive style, depending on the proximity to the sediment source. Draping clinothems are nearly...

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Seafloor Morphology and Processes in the Alboran Sea

Ercilla

Vázquez

Alonso

et al. 2021

Alboran Sea - Ecosystems and Marine Resources

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The infralittoral prograding wedge: a new large-scale progradational sedimentary body in shallow marine environments

Cited by 146 publications

References 0 publications

The El Masnou infralittoral sedimentary environment (Barcelona province, NW Mediterranean Sea): morphology and Holocene seismic stratigraphy

The El Masnou infralittoral sedimentary environment (Barcelona province, NW Mediterranean Sea): morphology and Holocene seismic stratigraphy

Clinoforms and clinoform systems: Review and dynamic classification scheme for shorelines, subaqueous deltas, shelf edges and continental margins

Seafloor Morphology and Processes in the Alboran Sea

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