Artículo
Decimeter-scale in situ mapping of modern cross-bedded dune deposits using parametric echo sounding : a new method for linking river processes and their deposits
Fecha de publicación:
08/2013
Editorial:
American Geophysical Union
Revista:
Geophysical Research Letters
ISSN:
0094-8276
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Collecting high-resolution data to quantify the sedimentary architecture within contemporary alluvial channels remains one of the outstanding challenges in fluvial sedimentology. Here, we present data collected using a new geophysical method, the parametric echo sounder (PES), which can meet this challenge. From surveys over a field of sand dunes in the Río Paraná, Argentina, we demonstrate the unique ability of PES to image the subsurface structure within active channels at a decimetric resolution. These data reveal the bounding surfaces between bars and dunes, as well as the foresets and reactivation surfaces within them. This provides quantitative in situ data for recent work that suggests cross-strata preserved by dunes may be more related to flow depths less than the commonly assumed bankfull level. These surveys demonstrate that PES can provide hitherto unobtainable data from alluvial channels and presents significant opportunities for more detailed coupled studies of fluvial processes and their deposits.
Palabras clave:
DUNES
,
PARAMETRIC ECHO SOUNDER (PES)
,
RIO PARANA
,
SEDIMENTOLOGY
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Identificadores
Colecciones
Articulos(CECOAL)
Articulos de CENTRO DE ECOLOGIA APLICADA DEL LITORAL (I)
Articulos de CENTRO DE ECOLOGIA APLICADA DEL LITORAL (I)
Citación
Sambrook Smith, Gregory H.; Best, James L.; Orfeo, Oscar; Vardy, Mark E.; Zinger, Jessica A.; Decimeter-scale in situ mapping of modern cross-bedded dune deposits using parametric echo sounding : a new method for linking river processes and their deposits; American Geophysical Union; Geophysical Research Letters; 40; 15; 8-2013; 3883-3887
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