Respuesta sedimentológica a los cambios ambientales de épocas históricas en el sur de la Península Ibérica: la secuencia de la Laguna Grande de Archidona (Málaga)

• J.A. Luque ^[2] ; R. Julià ^[2] ; S. Riera ^[3] ; M.A. Marqués ^[4] ; J.A. López Sáez ^[5] ; Francesc Mezquita ^[1]
  1. [1] Universitat de València

     Universitat de València

     Valencia, España

     
  2. [2] Instituto de Ciencias de la Tierra Jaume Aimera (CSIC)
  3. [3] SERP-Departamento de Prehistoria, Historia Antigua y Arqueología (UB)
  4. [4] Departamento de Geodinámica y Geofísica (UB)
  5. [5] Laboratorio de Arqueobotánica, Instituto de Historia (CSIC)

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• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 6, 5, 2004 (Ejemplar dedicado a: VI CONGRESO GEOLÓGICO DE ESPAÑA, ZARAGOZA, 12-15 JULIO, 2004), págs. 113-116
• Idioma: español
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• Resumen

  • The sediment core of the Laguna Grande de Archidona (235 cm in length) records lithological changes during historical times caused by climate and land use changes. On the basis of sedimen-tological and pollen data, four palaeoenvironmental episodes were distinguished. The oldest episode (period IV) is characterized by the occurrence of silty laminated sediments and a reduced oakforest cover. Land use indicates farming activities associated with cereals, grapes, olives and silkproduction. The next episode (period III), ending in 1650 AD with the development of a hydro-morphic soil, is characterized by nodular gypsum facies associated with drier conditions. Oakforest gently recovered, as did the herbaceous taxa. Land use changed towards an increase in grazing activities and a "dehesa" system. Between7 650 and7850 (period II), a new hydrological cyclestarts by the deposition of massive grey lutites overlying the hydromorphic soil. Oak forest and farming activities expanded at the expense of pastures. Finally, the last period (I) is characterized bythe occurrence of massive grey silts that record an increase in gypsum and Nitrogen. Now, thehuman activity determines the pollen diagram: expansion of olive crops, deforestation and introduction of exotic taxa.