Fluvial form in modern continental sedimentary basins: Distributive fluvial systems

Weissmann, Gary S.; Hartley, Adrian J.; Nichols, Gary; Scuderi, L. A.; Olson, Mark A.; Buehler, H.; Banteah, R.

doi:10.1130/g30242.1

Cited by 322 publications

(287 citation statements)

References 19 publications

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“…O conjunto de evidências coletado neste trabalho indica que a primeira hipótese (leques) é a mais provável. O empilhamento dos depósitos fluviais do Membro Morro Pelado pode corresponder a um preenchimento agradacional, como é previsto para bacias dominadas por sistemas fluviais distais (Nichols e Fisher, 2007;Weissmann et al, 2010;Davidson et al, 2012).…”

Section: Contexto Deposicional Do Membro Morro Peladounclassified

Distinção dos elementos deposicionais fluviais, eólicos e lacustres do Membro Morro Pelado, Permiano Superior da Bacia do Paraná

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Vesely

Fernandes

et al. 2014

Geol. USP, Sér. cient.

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Disponível on-line no endereço www.igc.usp.br/geologiausp -29 -Resumo O topo da Formação Rio do Rasto, Bacia do Paraná, corresponde ao Membro Morro Pelado, unidade composta pela associação de depósitos fluviais, eólicos e lacustres. A fim de retratar os elementos deposicionais presentes e caracterizar o estilo de sedimentação fluvial, uma análise faciológica foi realizada na faixa de afloramentos do leste dos estados de Santa Catarina e do Paraná. O Membro Morro Pelado é formado por quatro associações litofaciológicas: A, B, C e D. A associação litofaciológica A corresponde aos depósitos de canais meandrantes, presente na zona intermediária de um sistema fluvial distributário. A associação litofaciológica B pertence à zona distal do sistema fluvial, onde predominam depósitos de fluxos em lençol e canais retilíneos rasos (espraiamentos terminais fluviais). A associação litofaciológica C é definida como um sistema deltaico dominado por rios desenvolvido em momentos de subida do nível de base e formação de lagos. Por fim, a associação litofaciológica D caracteriza-se por depósitos de dunas (DU) e interdunas (IDU) recorrentes adjacentes a todas as porções do sistema fluvial distributário. O empilhamento estratigráfico revela aumento da quantidade e espessura dos depósitos eólicos em direção ao topo, indicando incremento da aridez no ambiente deposicional e expansão dos campos de dunas em direção às margens da bacia.Palavras-chave: Sistema fluvial; Clima semiárido; Interação fluvial-eólico; Elemento arquitetônico. AbstractThe Late Permian Morro Pelado Member is the upper part of the Rio do Rasto Formation of Paraná Basin and is composed of an association of fluvial, eolian and lacustrine deposits. In order to depict its facies associations and depositional elements as well as to characterize the fluvial style, a facies and architectural element analysis was carried out in the eastern outcrop belt in Santa Catarina and Paraná States, southern Brazil. Four facies associations (FA) were recognized: FA-A is interpreted as mixed-load meandering fluvial systems, with conspicuous laterally accreted macroforms, levees and floodplain fines; FA-B was deposited as terminal splays in the distal parts of the fluvial system, where sheet floods prevailed; FA-C defines a fluvial-dominated lacustrine delta formed in response to episodes of extreme flooding and rising water table in the terminal splay zone; FA-D comprises eolian dunes, wet and damp interdunes and eolian sand sheets that occur interbedded with the fluvial and lacustrine deposits marking periods of aridization in the alluvial plain. The vertical stacking pattern shows an upward increase in frequency and thickness of eolian deposits recording progressive expansion of the erg systems towards basin margins in response to progressive drying combined with high rates of accommodation and sediment supply.

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Section: Contexto Deposicional Do Membro Morro Peladounclassified

Distinção dos elementos deposicionais fluviais, eólicos e lacustres do Membro Morro Pelado, Permiano Superior da Bacia do Paraná

Schemiko

Vesely

Fernandes

et al. 2014

Geol. USP, Sér. cient.

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“…Nyburg and Howell (2015) showed that 93 modern continental sedimentary basins cover only ~16% of the current continental area if one excludes 94 the passive margin setting, thus only deposits from a relatively small portion of the modern continental 95 area will ultimately be preserved in the sedimentary rock record. 96 Weissmann et al (2010) and comprise most but not all of the fluvial deposits in these basins. Additionally, wenoted that 110 deposits of tributive fluvial systems comprise a much smaller percentage of the basin area.…”

Section: Introduction 70mentioning

confidence: 99%

“…We then review literature describingprocesses and deposits that occur on 138 some of these geomorphic elements. Significant discussion of fluvial successions and their potential for 139 preservation in the long-term rock record has occurred since Weissmann et al (2010Weissmann et al ( , 2011 (Fig. 2F).…”

Section: Introduction 70mentioning

confidence: 99%

Fluvial geomorphic elements in modern sedimentary basins and their potential preservation in the rock record: A review

et al. 2015

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“…The classical wedge shape of the basin infill with distinct four depozones, namely wedge-top, foredeep, forebulge, and backbulge was introduced by DeCelles & Giles (1996). However, modern foreland basins contain a number of smaller-scale depositional features and sedimentary trends, which might be unrecognized in ancient successions owing to the fact that regional data sets are required for their identification (e.g., DeCelles & Cavazza 1999;Shukla et al 2001;Hartley et al 2010;Weissmann et al 2010). When reconstructing fluvial and deltaic stratigraphy it is especially necessary to obtain a regional, three-dimensional data set.…”

Section: Introductionmentioning

confidence: 99%

Lower Badenian coarse-grained Gilbert deltas in the southern margin of the Western Carpathian Foredeep basin

Nehyba¹

2018

Geologica Carpathica

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Two coarse-grained Gilbert-type deltas in the Lower Badenian deposits along the southern margin of the Western Carpathian Foredeep (peripheral foreland basin) were newly interpreted. Facies characterizing a range of depositional processes are assigned to four facies associations -topset, foreset, bottomset and offshore marine pelagic deposits. The evidence of Gilbert deltas within open marine deposits reflects the formation of a basin with relatively steep margins connected with a relative sea level fall, erosion and incision. Formation, progradation and aggradation of the thick coarse-grained Gilbert delta piles generally indicate a dramatic increase of sediment supply from the hinterland, followed by both relatively continuous sediment delivery and an increase in accommodation space. Deltaic deposition is terminated by relatively rapid and extended drowning and is explained as a transgressive event. The lower Gilbert delta was significantly larger, more areally extended and reveals a more complicated stratigraphic architecture than the upper one. Its basal surface represents a sequence boundary and occurs around the Karpatian/Badenian stratigraphic limit. Two coeval deltaic branches were recognized in the lower delta with partly different stratigraphic arrangements. This different stratigraphic architecture is mostly explained by variations in the sediment delivery and /or predisposed paleotopography and paleobathymetry of the basin floor. The upper delta was recognized only in a restricted area. Its basal surface represents a sequence boundary probably reflecting a higher order cycle of a relative sea level rise and fall within the Lower Badenian. Evidence of two laterally and stratigraphically separated coarse-grained Gilbert deltas indicates two regional/basin wide transgressive/regressive cycles, but not necessarily of the same order. Provenance analysis reveals similar sources of both deltas. Several partial source areas were identified (Mesozoic carbonates of the Northern Calcareous Alps and the Western Carpathians, crystalline rocks of the eastern margin of the Bohemian Massif, older sedimentary infill of the Carpathian Foredeep and/or the North Alpine Foreland Basin, sedimentary rocks of the Western Carpathian/Alpine Flysch Zone).

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Fluvial form in modern continental sedimentary basins: Distributive fluvial systems

Cited by 322 publications

References 19 publications

Distinção dos elementos deposicionais fluviais, eólicos e lacustres do Membro Morro Pelado, Permiano Superior da Bacia do Paraná

Distinção dos elementos deposicionais fluviais, eólicos e lacustres do Membro Morro Pelado, Permiano Superior da Bacia do Paraná

Fluvial geomorphic elements in modern sedimentary basins and their potential preservation in the rock record: A review

Lower Badenian coarse-grained Gilbert deltas in the southern margin of the Western Carpathian Foredeep basin

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