Glacis geometry as a geomorphic marker of recent tectonics: The Guadix–Baza basin (South Spain)

García-Tortosa, Francisco J.; Alfaro, P.; Galdeano, Carlos Sanz de; Galindo-Zaldı́var, Jesús

doi:10.1016/j.geomorph.2010.10.021

Cited by 40 publications

(46 citation statements)

References 30 publications

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“…This fault is the limit between the two sub-basins and its movements caused the subsidence of the hanging wall, with the development of a large lake in the eastern part of the basin (the Baza sub-basin) that existed till the late Pleistocene. The sequence is capped by a 0.5-1 m-thick calcrete interpreted as a glacis surface, which outcrops in a widespread area (more than 1200 km 2 ) of the Guadix Basin and is one of the best markers of the recent deformation in the basin (García Tortosa et al, 2011). Its age ranges between 600 and 205 ka (Scott and Gibert, 2009;Díaz-Hernández and Julià, 2006).…”

Section: Active Faults In the Granada Basinmentioning

confidence: 99%

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Main active faults in the Granada and Guadix-Baza Basins (Betic Cordillera)

Galdeano¹,

García-Tortosa

Peláez

et al. 2012

Journal of Iberian Geology

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The Granada and Guadix-Baza Basins, the largest Neogene-Quaternary intramontane basins of the Betic Cordillera (southern Spain), undergo active deformation with an associated moderate level of seismic activity. This deformation is controlled by a NNW-SSE compressive regime and an approximate orthogonal tensional regime. The compression produced N70ºE to E-W folds of several scales, the Sierra Nevada antiform being the largest one. The tension is accommodated mainly by NW-SE active normal faults, the most notable being the Baza Fault, in the Guadix-Baza Basin, and the Granada, Sierra Elvira-Dílar and Padul-Dúrcal Faults, in the Granada Basin. In addition, other active faults with different orientations also exist, such as the Alfahuara-Botardo and the Galera faults in the Guadix-Baza Basin, and the Huenes, Obéilar-Pinos Puente and N of Sierra Tejeda Faults in the Granada Basin. Moreover, in several sectors, the presence of orthogonal normal fault sets suggests alternating trends or even radial extension. Slip rates of these active faults, based on geologic markers, vary between 0.06 and 0.5 mm/year. Estimates for the maximum expected magnitude of earthquakes caused by these faults vary between M W 6.0 and 7.0. The N of Sierra Tejeda and the Baza Faults, the larg-ISSN (print): 1698-6180. ISSN (online): 1886-7995

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Section: Active Faults In the Granada Basinmentioning

confidence: 99%

“…3). Its endorheic character persisted till the late Pleistocene (Viseras, 1991;García Tortosa et al, 2011). The Earthquake swarms are frequent in this region.…”

Section: Main Geological Features Of the Granada And Guadix-baza Basinsmentioning

confidence: 99%

Main active faults in the Granada and Guadix-Baza Basins (Betic Cordillera)

Galdeano¹,

García-Tortosa

Peláez

et al. 2012

Journal of Iberian Geology

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“…The differences are probably linked to the recent tectonics of the Sierra Nevada extensional dome. The Guadix-Baza basin's present-day topography consists of a high plateau with a mean altitude of 1000 m, strongly dissected by the river network (Pérez-Peña et al, 2009d;García-Tortosa et al, 2011) (Fig. 1).…”

Section: F and S Mf Indexesmentioning

confidence: 99%

Active tectonics in the central and eastern Betic Cordillera through morphotectonic analysis: the case of Sierra Nevada and Sierra Alhamilla

Azañón

Pérez-Peña

Giaconia

et al. 2012

Journal of Iberian Geology

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Quaternary activity of folds and faults can be assessed by the analysis of drainage network and the evaluation of geomorphic indexes. These analyses are especially productive in semiarid areas where tectonic rates are low-to-moderate and Quaternary dating is limited. In this work, we have revisited the most relevant GIS-based methodologies used to assess tectonic activity by using morphometric analyses and we discuss the tectonic implications in two key areas of the central and eastern Betic Cordillera (Sierra Nevada and Sierra Alhamilla regions). In the Sierra Nevada area, the use of geomorphic indexes in the mountain range and in the neighboring Granada and Guadix-Baza basins suggests that all are part of the same SW-directed extensional system. The Granada basin (except in its NE border) subsided during the Late Pleistocene as it is located in the hanging wall of the extensional system. On the other hand, the Sierra Nevada mountain range, the NE border of the Granada basin and the Guadix-Baza basin are located in the active uplifted foot wall of the system. Thus, the higher fluvial incision rates in the Guadix-Baza basin can be directly correlated with the most recent uplift history of Sierra Nevada mountain range. In the Sierra Alhamilla region, a geomorphic study shows Late Pleistocene activity along the North Alhamilla Reverse Fault and the dextral transpressive South Gafarillos Fault, two segments of the Polopos Fault Zone, previously considered as an inactive fault.Keywords: Betic Cordillera, active tectonics, drainage networks, tectonic geomorphology ResumenLa actividad cuaternaria de pliegues y fallas puede ser estimada mediante el análisis de las redes de drenaje y el cálculo de índi-ces geomorfológicos. Este tipo de análisis es especialmente útil en zonas semiáridas con tasas de bajas y moderadas de actividad tectónica, y con escasas dataciones cuaternarias. En este trabajo hemos hecho una revisión de los principales trabajos que utilizan ISSN (print): 1698-6180. ISSN (online): 1886-7995

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“…Several studies have used LiDAR data to analyze tectonic deformation of alluvial fans and marine terraces. Frankel et al [37] determined new slip rates of the Death Valley-Fish Lake Valley fault system in eastern California and western Nevada by combining alluvial fan offsets measured from 1-m resolution LiDAR-derived DEM with 10 Be TCN and OSL ages from displaced alluvial fans. In a study of deformation variations off the San Andreas Fault, Crosby et al [38] extracted elevations of the marine terrace inner edges from a LiDAR-derived DEM between Fort Ross and Mendocino, California.…”

Section: Planar Geomorphic Markers Revealed By Lidarmentioning

confidence: 99%