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Sand Waves in the Gulf of San Matias, Argentina

C. L. So, J. W. Pierce and F. R. Siegel
Geografiska Annaler. Series A, Physical Geography
Vol. 56, No. 3/4 (1974), pp. 227-235
Published by: Wiley on behalf of the Swedish Society for Anthropology and Geography
DOI: 10.2307/520709
Stable URL: http://www.jstor.org/stable/520709
Page Count: 9
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Sand Waves in the Gulf of San Matias, Argentina
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Abstract

The Gulf of San Matias, Argentina, provides examples of unusual, large sand waves located on the sill of a small semi-enclosed basin. The distribution of the waves appears to be related to changes in depth and in submarine topography. An analysis of the characteristics of the waves from sounding records taken at different times reveals variations both down-current and with time. These variations, together with superimposed micro-relief forms and broken wave crests, would point to some transformation of the sand waves. In the light of local tidal dynamics, this would indicate concomitant encroachment of sand waves on the deep water inshore and shoaling of the bay unless some counteracting processes are operating. The impact of such transformation of sand waves on marine sedimentation in general, and on coastal deposition and harbour siltation in particular, has not been given the attention it deserves.

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