Las fallas del recinto de la Alhambra.

  1. Azañón, J.M. 1
  2. Azor, A. 1
  3. Booth Rea, G. 2
  4. Martín Rosales, W. 1
  5. de Justo Alpañés, J.L. 3
  6. Torcal, F. 4
  7. Espinar, M. 1
  1. 1 Universidad de Granada
    info
    Universidad de Granada

    Granada, España

    ROR https://ror.org/04njjy449

    Geographic location of the organization Universidad de Granada
  2. 2 GEOMAR Helmholtz Centre for Ocean Research Kiel
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    GEOMAR Helmholtz Centre for Ocean Research Kiel

    Kiel, Alemania

    ROR https://ror.org/02h2x0161

    Geographic location of the organization GEOMAR Helmholtz Centre for Ocean Research Kiel
  3. 3 Universidad de Sevilla
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    Universidad de Sevilla

    Sevilla, España

    ROR https://ror.org/03yxnpp24

    Geographic location of the organization Universidad de Sevilla
  4. 4 Universidad Pablo de Olavide
    info
    Universidad Pablo de Olavide

    Sevilla, España

    ROR https://ror.org/02z749649

    Geographic location of the organization Universidad Pablo de Olavide
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Journal:
Geogaceta

ISSN: 0213-683X

Year of publication: 2003

Issue: 34

Pages: 159-162

Type: Article

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Abstract

The Alhambra is built on a conglomeratic formation, known as the Alhambra Formation, whose age is Pliocene to Lower Pleistocene and has a visible thickness of 200 metres. The western part of the San Pedro escarpment corresponds to a fault-scarp with some retreat; the fault-plane outcrops in the innermost part of the escarpment, showing normal displacement and NW-SE strike with NE steep dip. This fault is the most important one of a set that outcrops along the northern hillslope of the Alhambra. Several topographic steps with NW-SE orientation are interpreted as retreated fault-scarps. In some cases; the activity of these faults seems to be very recent and maybe related to earthquakes. The seismic risk associated with these faults (and maybe some not-outcropping ones) can be taken to be moderate, as some historical damages have been reported concerning the Alhambra walls and the fence. In this respect, the Alhambra fence has numerous cracks geometrically related to fault planes outcropping in the Alhambra Formation, i.e. faults and cracks are continuous and have similar strike and dip. We hypothesize that these cracks are due to small displacements along the faults, occurred during recent earthquakes in the region. These faults constitute mechanical discontinuities, which represent a supplementary risk, beca use they contribute to reduce the stability of the en tire rock massif.

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