Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 432527
Title The effect of passive margin dimensions and eustatic changes on river terrace distribution: a case study of the NW Iberian Lower Miño River
Author(s) Viveen, W.; Schoorl, J.M.; Veldkamp, A.; Balen, R.T. van; Desprat, S.; Vidal-Romani, J.R.
Source In: VII Symposium on the Atlantic Iberian Margin, 16-20 december 2012, Lisboa. - Universidade de Lisboa, Portugal : - p. 166 - 166.
Event Universidade de Lisboa, Portugal : VII Symposium on the Atlantic Iberian Margin, 16-20 december 2012, 2012-12-16/2012-12-20
Department(s) Land Dynamics
Publication type Contribution in proceedings
Publication year 2012
Abstract Various ideas about the main controlling factors for terrace formation in the Lower Miño River basin are proposed, but no consensus exists. Absence of fossils and other chronostratigraphical markers make long-distance correlations between the terraces remnants along the river profile tentative. The most accepted view is that the terrace remnants tread parallel to the current river bed, because terraces are found at similar altitudes above river level throughout the Lower Miño region. This in turn, would favour an interglacial origin for the terrace deposits. Precise mapping of terrace distribution and the weathering state of quartzite pebbles in the fluvial terraces however, suggests that the terraces do not tread parallel to the current river bed. This is confirmed by a numerical modelling evaluation with the FLUVER2 model of the development of the Miño longitudinal profile for the past 450 ka. The results indicate that the proximity of a steep and narrow passive margin in combination with eccentricity-induced eustatic changes are the main controlling factors for valley incision and terrace formation. They cause a strong lowering in base level, which results in a much steeper river profile gradient of approximately 1 m km-1 during periods of low sea level.
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