%0 Journal Article
%A Dabrio, Cristino J.
%T Coastal sedimentary environments and sea-level changes
%D 2000
%@ 0254-055X
%U https://hdl.handle.net/20.500.14352/57476
%X A detailed knowledge of the 3-D arrangement and lateral facies relationships of the stacking patterns in coastal deposits isessential to approach many geological problems such as precise tracing of sea level changes, particularly during small scale fluctuations.These are useful data regarding the geodynamic evolution of basin margins and yield profit in oil exploration. Sedimentsupply, wave-and tidal processes, coastal morphology, and accommodation space generated by eustasy and tectonics govern thehighly variable architecture of sedimentary bodies deposited in coastal settings. But these parameters change with time, and erosionalsurfaces may play a prominent role in areas located towards land. Besides, lateral shift of erosional or even depositional locivery often results in destruction oflarge parts ofthe sediment record. Several case studies illustrate some commonly found arrangementsoffacies and their distinguishing features. The final aim is to get the best results from the sedimentological analysis of coastalunits.[RESUMO]o conhecimento detalhado do arranjo tridimensional e das relayoes laterais de facies nos depositos costeiros sao essenciais paradefinir, corn precisao, as variayoes do nivel do mar, em especial as flutuayoes de pequena escala. Estas fornecem dados uteis para 0reconhecimento da evoluyao geodinamica das margens das bacias bem como para a pesquisa e explorayao de petroleo. 0 acarreiosedimentar, os processos ondulatorios e de mares, a morfologia costeira e 0 espayo de acomodayao gerado pela eustasia e pelatectonica sao os responsaveis pela arquitectura muito variavel dos corpos sedimentares depositados em arnbientes costeiros. Todavia,estes parametros variam no tempo, e as superficies de erosao podem ter papel importante nas areas proximas do continente. Alemdisso, a deslocayao lateral da erosao ou mesmo lacunas sedimentares conduzem, corn frequencia, a destruiyao de parte significativado registo sedimentar. Apresentam-se exemplos que ilustram alguns arranjos frequentes de facies e os seus parametros caracteristicoscorn vista a obter os melhores resultados na analise sedimentologica das unidades costeiras.
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