Sedimentary Structures: Mississippi River Deltaic Plain

Coleman, James M.; Gagliano, Sherwood M.

doi:10.2110/pec.65.08.0133

Cited by 100 publications

(85 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As observed in recent deltaic environments, the narrow river-mouth bars typically show a lunate shape in plan view (bar crests), and their deposition is related to inertia-dominated effluent diffusion (Wright 1977). The upper topset deposits, composed of channel-fill sediments, levee deposits, and finergrained sediments that accumulated in interdistributary troughs and open bay settings, represent a delta-plain environment (Fisk 1961;Coleman and Gagliano 1965;Donaldson et al 1970;Gould 1970). The channel deposits are interpreted as the products of straight and stable distributaries whose energy decreased progressively, resulting in infill of the channels with fining-upward sequences.…”

Section: Topset Depositsmentioning

confidence: 90%

“…The lower sediment package (ϳ2.5 m thick), comprising multistory, erosional sandstone beds with planar and trough crossstratification, is interpreted as upper delta-front deposits which accumulated mainly under the influence of fluvial discharge and which represent the subaqueous part of the topset deposits (Coleman and Gagliano 1965). As a whole, the lower part of the topset sediments and underlying foreset and bottomset deposits constitute a rivermouth bar showing a Gilbert-type profile that was deposited in a delta-front environment (Wright 1977).…”

Section: Topset Depositsmentioning

confidence: 99%

See 1 more Smart Citation

Architecture of a Bench-Type Carbonate Lake Margin and Its Relation to Fluvially Dominated Deltas, Las Minas Basin, Upper Miocene, Spain

Calvo¹,

Gómez‐Gras²,

Alonso-Zarza³

et al. 2000

Journal of Sedimentary Research

View full text Add to dashboard Cite

The Upper Miocene stratigraphic succession of the Las Minas Basin, located at the external zone of the Betic Chain in SE Spain, preserves several examples of lake carbonate bench deposits. Excellent exposures of the carbonate benches allow detailed observation of the architecture of these sediments and provide new insights for the ''steep-gradient bench margin-low energy'' model proposed by Platt and Wright (1991). The lake carbonate benches developed in close association with fluvially dominated shallow deltas that exhibit typical Gilbert-type profiles. The delta sequences comprise bottomset prodelta marl facies, distal to proximal foreset facies, deposited mainly in a delta-front environment, and topset facies, the latter reflecting both subaqueous delta-front and subaerial delta-plain environments. The development of the carbonate benches was constrained by the convexupward morphology of the deltaic deposits, which led to the available accommodation space for the growth of the steep-gradient platforms. The benches display a progradational pattern characterized by sigmoid-oblique internal geometries and offlap upper boundary relationships, which suggests that the carbonate benches developed under slow though continuous lake-level rise. Both the dimensions of the benches and the dominant carbonate components (i.e., encrusted charophyte stems and calcified cyanobaterial remains), allow comparisons with the progradational marl benches recognized in modern temperate hardwater lakes. Accordingly, the case study presented here provides a good ancient sedimentary analog for low-energy lake carbonate benches. Moreover, the evolutionary trend inferred from the fossil example offers new insights into the depositional conditions of this type of sediment and allows recognition of the transitional pattern from bench to ramp carbonate lake margins.

show abstract

Section: Topset Depositsmentioning

confidence: 90%

Section: Topset Depositsmentioning

confidence: 99%

Architecture of a Bench-Type Carbonate Lake Margin and Its Relation to Fluvially Dominated Deltas, Las Minas Basin, Upper Miocene, Spain

Calvo¹,

Gómez‐Gras²,

Alonso-Zarza³

et al. 2000

Journal of Sedimentary Research

View full text Add to dashboard Cite

show abstract

“…Ab 'Saber (1957); Bigarella e Mousinho (1965); Christofoletti (1969); Fernandez (1990); Stevaux (1993); Fontes (2002); Zancopé et al, (2006;2007); Bayer e Carvalho (2008); Carvalho (2009);Rocha (2010) e Marçal (2013) são alguns dos autores que realizaram pesquisas no país referentes à dinâmica e mudanças das formas fluviais, enquanto que Davis (1889); Bernard e Major (1963); Coleman e Gagliano (1965); Shumm (1968); Chorley e Kennedy (1971); Newson e Large (2006) e Rice et al, (2009) são alguns entre vários autores internacionais que trabalharam com essa temática. Christofoletti (1969) evidencia que as pesquisas que envolvem a análise da rede hidrográfica auxiliam na compreensão de muitas questões geomorfológicas, responsáveis pela esculturação da paisagem.…”

Section: Introductionunclassified

Sensitividade Fluvial Da Drenagem Principal Da Bacia Hidrográfica Do Rio Sagrado - Serra Do Mar Paranaense

Kleina

Santos

2017

Revista Ra'e Ga

View full text Add to dashboard Cite

RESUMOA sensitividade fluvial permite reconhecer pontos sujeitos às mudanças na rede de drenagem, identificadas por meio das forças de resistência (capacidade do sistema em resistir a uma alteração do estado inicial) e perturbação (aplicações de energias, como clima, interferências bióticas e antrópicas). Diante do exposto, o presente trabalho tem como objetivo determinar a sensitividade fluvial nas principais drenagens que compõem a bacia hidrográfica do rio Sagrado, localizada em Morretes, na Serra do Mar paranaense. Para obtenção dos resultados, tornou-se necessária a identificação dos estilos e ajustes fluviais, concentração de erosão, conectividade fluvial e evolução da ocupação da terra na bacia. Os dados foram sobrepostos e analisados, evidenciando que as maiores perturbações foram localizadas nos rios Sagrado e Sambaqui, principalmente próximas às planícies, classificadas como alta sensitividade. Diferentemente, rios margeados pelas altas declividades da Serra do Mar, recobertos por vegetação em estágio médio/avançado, situam-se locais com pouca probabilidade de mudanças, sendo denominadas como baixa sensitividade. Assim conclui-se que os terços de rios localizados em planícies possuem poucas resistências e muitas alterações no uso da terra, enquanto que nas altas declividades, em vales fluviais confinados e parcialmente confinados, a sensitividade apresenta-se baixa. PALAVRAS-CHAVE:Resistências; Perturbações; Mudanças; Sistema fluvial. ABSTRACTThe fluvial sensitivity allows to recognize points subject to changes in the drainage network, identified by the resistance forces (ability of the system to withstand a change of the initial state) and disturbance (energy applications such as climate, biotic and anthropic interference). Thus, the research's objective is to map the fluvial sensitivity in the major rivers that compose the Sagrado River watershed, located in Morretes, Serra do Mar, Paraná State. In order to obtain the results, it was necessary to identify the style and fluvial adjustments, erosion concentration, fluvial connectivity and land use evolution in the basin. The data were overlapped and confronted, evidencing that the major disturbances were located in Sagrado and Sambaqui rivers, especially near the plains areas, classified as high sensitivity. In contrast, rivers bordered by high slopes of the Serra do Mar, covered with vegetation in medium/advanced stage, are situated places of probability of minor changes, being named as low sensitivity. So it is concluded that thirds of rivers located in plains have low resistance and a lot of changes in land use, whereas in high declivity, in confined and partially confined fluvial valleys, the sensitivity appears low.

show abstract

“…The characteristic sedimentary structures within the Gm fades of the KH-3 conglomerate are similar to those of a Gilbert-type delta; i.e. steeply 96 dipping forset beds in the lower portion and that overlain by gently dipping topset beds ( Figure 35) Fine sand bottom set beds are not preserved at Hadar, perhaps due to counter currents flowing along the bottom from the lake toward the delta with suflBcient velocity to wash away such sand (Coleman and Gagliano, 1965).…”

Section: Depositional Environmentmentioning

confidence: 91%

“…Events associated with flood conditions cause crevasse splays to develop along channels and provided a mechanism for supplying the floodplain with relatively large quantities of sediments (Coleman and Gagliano, 1965). from sihstone from the upper part of the Kada Hadar Member above the disconformity suggests that there is not only a depositional environment change above the disconformity, but there is also significant faunal turn over and climatic change above the unconformity (Eck and Reed, in press).…”

Section: Lower Kada Hadar Membermentioning

confidence: 99%

Stratigraphy and sedimentology of the Hadar Formation Afar, Ethiopia

Yemane

View full text Add to dashboard Cite

Sedimentary Structures: Mississippi River Deltaic Plain

Cited by 100 publications

References 0 publications

Architecture of a Bench-Type Carbonate Lake Margin and Its Relation to Fluvially Dominated Deltas, Las Minas Basin, Upper Miocene, Spain

Architecture of a Bench-Type Carbonate Lake Margin and Its Relation to Fluvially Dominated Deltas, Las Minas Basin, Upper Miocene, Spain

Sensitividade Fluvial Da Drenagem Principal Da Bacia Hidrográfica Do Rio Sagrado - Serra Do Mar Paranaense

Stratigraphy and sedimentology of the Hadar Formation Afar, Ethiopia

Contact Info

Product

Resources

About