Universität zu Köln

Silva, P. G., Roquero, E., Bardaji, T. and Medialdea, A. (2020). Pleistocene to Holocene phases of sedimentation and soil formation in the semiarid SE Spain (Eastern Betic Cordillera). Cuatern. Geomorfol., 34 (1-2). S. 41 - 62. MADRID: SPANISH QUATERNARY RESEARCH ASSOC. ISSN 0214-1744

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Abstract

This work uses the set of available regional geochronological data (OSL, TL, C-14, Th/U) on alluvial sediments, calcretes and soils for the semiarid SE Spain to build a theoretical time-scale for the most important phases of sedimentation and soil formation occurred in the zone from the Middle Pleistocene to the Holocene. Most of the data come from the set of paleoseismic and paleoclimatic research carried out in the regions of Murcia and Almeria over the past years. The gathered geochronological data set has 168 dates, 52 for calcic soils and calcretes and 116 for sediments and covers the last c. 400 ka. The analysis is based in the construction of age-frequency distribution functions discriminating bins of 5 ka, which offer enough resolution to distinguish among different Oxygen Isotopic Stages (OIS). The Holocene dataset is analysed separately discriminating time-bins of 0.5 ka according to the more robust data-data set C-14 ages. Calcretes appears as elements developed during the last stages of warm isotopic stages (OIS 9 to 1), whilst sedimentation dominated during the transition between warm-cold isotopic stages, especially during terminations II to I, coinciding with deglaciation periods. During the Holocene the climatic events of 8.2 and 2.4 ka are clearly identified as drier periods with minor sedimentation, but enhanced calcrete formation, especially the first one.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Silva, P. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Roquero, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bardaji, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Medialdea, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-331406
DOI:	10.17735/cyg.v34i1-2.78815
Journal or Publication Title:	Cuatern. Geomorfol.
Volume:	34
Number:	1-2
Page Range:	S. 41 - 62
Date:	2020
Publisher:	SPANISH QUATERNARY RESEARCH ASSOC
Place of Publication:	MADRID
ISSN:	0214-1744
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language IBERIAN PENINSULA; HERPETOFAUNAL ASSEMBLAGES; MIDDLE PLEISTOCENE; FAULT; MURCIA; QUATERNARY; ALHAMA; BASIN; ZONE; FAN Multiple languages Geology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33140