Propuesta de un modelo de evolución de costas acantiladas calcáreasAsturias y Cantabria (Norte de España)

  1. G. Flor-Blanco 1
  2. V. Bruschi 2
  3. L. Adrados 3
  4. G. Flor 1
  5. A.S. Trenhaile 4
  6. M.J. Domínguez 1
  7. A. Cendrero 2
  8. J. Remondo 2
  1. 1 Área de Estratigrafía. Departamento de Geología. Universidad de Oviedo
  2. 2 Universidad de Cantabria
    info

    Universidad de Cantabria

    Santander, España

    ROR https://ror.org/046ffzj20

  3. 3 Geolag. Geological Tourism
  4. 4 Department of Earth and Environmental Sciences, University of Windsor
Erakutsi afiliazioak +
Aldizkaria:
Geotemas (Madrid)

ISSN: 1576-5172

Argitalpen urtea: 2015

Zenbakien izenburua: VIII Jornadas de Geomorfología Litoral

Zenbakia: 15

Orrialdeak: 13-16

Mota: Artikulua

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Beste argitalpen batzuk: Geotemas (Madrid)

Laburpena

Main larger morphologies are regarded in a coastal cliff in the North of Spain (Asturias and Cantabria regions). The main goal is the establishment of a hypothesis about the geomorphologic evolution of the area. The evolution process starts with the formation of an ancient abrasion platform (“rasa”) corresponding to a relative lowering of the sea level. Afterwards, wave erosion processes eroded the cliff front, weakness planes (faults, joints or lithological contacts) and existing ducts. Simultaneously, epidermal karst activity produces some exokarst morphologies as lapiaz, while the underground drainage systems created some caves and chasms. During the following sea level decrease, corresponding to the last cooler period, fluvial network deepened, leaving disconnected galleries, containment existent caves and chasms and generating new ones. On the surface, dissolution processes of limestone create sinkholes (mainly due to the presence of compact limestone in Asturias) and collapses where alternate layers of limestone and marl (Cantabria).Since Flandrian transgression, the sea level rise gets the maximum value and starts a new erosion stage of the coastal cliff, as well as, the sedimentation in estuaries and beaches. Other morphological units were developed such as internal beaches, inner estuarie, blowholes, flooded collapse sinkholes and tombolo are described and included in the evolution model of these areas.

Datuen iturria: Dialnet