Las playas cementadas del “Antropoceno” de Bizkaia, País Vascoorigen y degradación

  1. V. Pujalte 1
  2. H. Astibia 1
  3. F. Aizpiri 2
  4. A. Payros 1
  1. 1 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  2. 2 Lurgintza, Ingeniería Geológica
Journal:
Geogaceta

ISSN: 0213-683X

Year of publication: 2015

Issue Title: Comunicaciones presentadas en la LVII Sesión Científica / Madrid, 27-28 de Noviembre de 2014

Issue: 57

Pages: 123-126

Type: Article

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Abstract

The Altos Hornos de Vizcaya Siderurgy dumped into the sea nearly 30 million tons of waste between 1902 and 1966. Most of it settled and consolidated on the shelf bottom but wave currents dragged a significant fraction to the shoreline, where it became quickly cemented. The resulting beachrocks have two main parts, the lower one being conglomeratic and strongly cemented, the upper one dominantly sandy and weakly cemented. After cessation of the dumping, lack of sedimentary supply prompted the erosion of the beachrocks in two different ways: by attrition and by uprooting of large blocks during storms in the lower part; and by block collapse after excavation at its base in the upper one, followed by disaggregation of the collapsed blocks. Erosion is currently progressing more rapidly in the upper sandy part, which is estimated to be completely removed after two or three decades.

Data source: Dialnet