Facies Architecture of a Falling Sea-Level Strandplain, Doce River Coast, Brazil

  1. D. J. P. Swift3,
  2. G. F. Oertel3,
  3. R. W. Tillman4 and
  4. J. A. Thorne5
  1. J. M. L. Dominguez and
  2. H. R. Wanless

Published Online: 14 APR 2009

DOI: 10.1002/9781444303933.ch7

Shelf Sand and Sandstone Bodies: Geometry, Facies and Sequence Stratigraphy

Shelf Sand and Sandstone Bodies: Geometry, Facies and Sequence Stratigraphy

How to Cite

Dominguez, J. M. L. and Wanless, H. R. (1992) Facies Architecture of a Falling Sea-Level Strandplain, Doce River Coast, Brazil, in Shelf Sand and Sandstone Bodies: Geometry, Facies and Sequence Stratigraphy (eds D. J. P. Swift, G. F. Oertel, R. W. Tillman and J. A. Thorne), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303933.ch7

Editor Information

  1. 3

    Norfolk, Virginia, USA

  2. 4

    Tulsa, Oklahoma, USA

  3. 5

    Plano, Texas, USA

Author Information

  1. Rosenstiel School of Marine and Atmospheric Sciences, Marine Geology and Geophysics Division, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149-1098, USA

  1. Instituto de Geociencias—UFBa, Rua Caetano Moura 123, Federação 40210, Salvador, Bahia, Brazil

Publication History

  1. Published Online: 14 APR 2009
  2. Published Print: 30 JAN 1992

ISBN Information

Print ISBN: 9780632032372

Online ISBN: 9781444303933

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Keywords:

  • regressive shelf and coastal sandstones;
  • fades architecture of falling sea-level strandplain, Doce River coast, Brazil;
  • geomorphological units of Doce strand plain;
  • two-dimensional evolutionary scheme of Doce strandplain;
  • sedimentary fill of palaeolagoonal depression formed during submergence phase;
  • lagoonal deposits associated with submergence phase II;
  • littoral zone deposits;
  • Bruun's rule and stratigraphic record of littoral zone sequences

Summary

The Doce River strandplain, located on the east coast of Brazil, comprises Holocene and Pleistocene beach-ridge terraces, fluvial, lagoonal, freshwater swamp and mangrove swamp deposits.

The Holocene evolutionary history of this strandplain was controlled by the interaction of sea-level changes, riverine sediment supply and wave reworking. The rise in sea-level that followed the last glacial period drowned the Pleistocene strandplain of the Doce River. A barrier-island–lagoonal system formed as a result of this drowning. After 7 ka, with decreasing rates of sea-level rise, the Doce River began emptying into the palaeolagoon and built an intra-lagoonal delta.

During deposition of the late Holocene portion of the strandplain, sea-level dropped 4–5 m from its maximum at about 5.1 ka. During this drop the shoreline downdrift of the river mouth advanced through a mechanism of coastwise extension of sand spits, generating in this process elongate lagoons that later became low-lying areas separated from each other by beach-ridge sets. From 3.8 to 3.5 ka, sea-level rapidly rose 2–3 m above present. The aforementioned low-lying areas were invaded by the sea and became interconnected bays. The updrift side, which prograded through the successive accretion of beach ridges, remained relatively unaffected during this rise. After 3.5 ka, progradation resumed in association with a drop in sea-level.

Theoretical considerations of the Bruun's rule of translation of the shoreface profile shows that during a rise in sea-level, lower shoreface deposits will be preserved preferentially. Conversely, during a drop, only those sediments deposited in the foreshore/upper shoreface will survive. Testing of this model in the study area did not produce conclusive results, probably because the large volume of riverborne sediments masked the effect of sea-level changes during deposition of the littoral zone sequences.