Ana Isabel Ortega Martínez - Academia.edu (original) (raw)
Uploads
Papers by Ana Isabel Ortega Martínez
PLoS ONE, 2014
The archaeological karstic infill site of Galería Complex, located within the Atapuerca system (S... more The archaeological karstic infill site of Galería Complex, located within the Atapuerca system (Spain), has produced a large faunal and archaeological record (Homo sp. aff. heidelbergensis fossils and Mode II lithic artefacts) belonging to the Middle Pleistocene. Extended-range luminescence dating techniques, namely post-infrared infrared stimulated luminescence (pIR-IR) dating of K-feldspars and thermally transferred optically stimulated luminescence (TT-OSL) dating of individual quartz grains, were applied to fossil-bearing sediments at Galería. The luminescence dating results are in good agreement with published chronologies derived using alternative radiometric dating methods (i.e., ESR and U-series dating of bracketing speleothems and combined ESR/U-series dating of herbivore teeth), as well as biochronology and palaeoenvironmental reconstructions inferred from proxy records (e.g., pollen data). For the majority of samples dated, however, the new luminescence ages are significantly (,50%) younger than previously published polymineral thermoluminescence (TL) chronologies, suggesting that the latter may have overestimated the true burial age of the Galería deposits. The luminescence ages obtained indicate that the top of the basal sterile sands (GIb) at Galería have an age of up to ,370 thousand years (ka), while the lowermost sub-unit containing Mode II Acheulean lithics (base of unit GIIa) was deposited during MIS 9 (mean age = 313614 ka; n = 4). The overlying units GIIb-GIV, which contain the richest archaeopalaeontological remains, were deposited during late MIS 8 or early MIS 7 (,240 ka). Galería Complex may be correlative with other Middle Pleistocene sites from Atapuerca, such as Gran Dolina level TD10 and unit TE19 from Sima del Elefante, but the lowermost archaeological horizons are ,100 ka younger than the hominin-bearing clay breccias at the Sima de los Huesos site. Our results suggest that both pIR-IR and single-grain TT-OSL dating are suitable for resolving Middle Pleistocene chronologies for the Sierra de Atapuerca karstic infill sequences.
Frontiers in Behavioral Neuroscience, 2015
† These authors have contributed equally to this work.
El karst de Ojo Guareña (Merindad de Sotoscueva, Burgos) contiene un amplio y variado conjunto de... more El karst de Ojo Guareña (Merindad de Sotoscueva, Burgos) contiene un amplio y variado conjunto de manifestaciones artísticas rupestres que abarca momentos paleolíticos y de la Prehistoria reciente. Las recientes actividades arqueológicas se han enfocado a la documentación, registro y análisis de uno de sus conjuntos, la Sala de la Fuente, donde se localiza un importante conjunto de grabados post-paleolíticos del cual se presentan aquí unas primeras valoraciones técnicas y formales. Las excepcionales condiciones de conservación y de contextualización del dispositivo iconográfico y de su entorno, han permitido obtener unas primeras dataciones indirectas para encuadrar el momento de ejecución de los grabados, haciendo referencia los resultados a un espectro cronológico variable entre momentos finales del Neolítico y las fases finales del Calcolítico.
on motivo de la realización, por parte del Ayuntamiento de Lerma, de unas obras, junto al número ... more on motivo de la realización, por parte del Ayuntamiento de Lerma, de unas obras, junto al número 3 de la calle de la Paloma, tendentes a solventar una fuga de agua, se produjo un hundimiento de la calzada, apareciendo una cavidad que, en principio, se pensó podría tratarse de una antigua bodega o subterráneo artificial.
La comarca de Juarros constituye un ámbito geográfico situado a unos 20 km al sureste de la capit... more La comarca de Juarros constituye un ámbito geográfico situado a unos 20 km al sureste de la capital. Se accede desde la carretera N-120 al tomar, a la altura del P.K. 101,5, la carretera BU-V-8001 y, una vez superado el puente sobre el río Arlanzón en San Millán de Juarros, debe continuarse por la carretera BU-V-8002 cuyo trazado sigue el valle del río Cueva hasta llegar al pueblo del mismo nombre, punto alrededor del cual se sitúan la mayoría de las cavidades objeto de este artículo.
The site of Galería del Sílex, part of the Atapuerca complex in Burgos, Spain, is exceptional for... more The site of Galería del Sílex, part of the Atapuerca complex in Burgos, Spain, is exceptional for the conditions of its discovery, as well as for the good state of preservation of the graphic manifestations and archaeological assemblage it contains. As a result, it has been possible to learn about
some of the burial practices and ritual behavior of the Bronze Age societies that lived in this region. Certain charcoal-drawn figures have been found in the Galería del Sílex, a rare form for Post-Paleolithic rock art, that is commonly dominated by engravings and red paintings located in open-air sites or rockshelters. Under the exceptional cave conditions, we
have obtained dates of 3,530±110 yr BP and 3,670±40 yr BP for Galería del Sílex drawings, representing one of the first
results of this kind obtained for Post-Palaeolithic rock art in Western Europe. These results provide us with a solid evidence for the development of graphic manifestations in early complex societies and bring into question previous stylistic proposals, that were mainly based on artistic
arguments and comparisons with limited ceramic decorated assemblages."
BAR International Series, (1857, Archaeopress, Oxford), 1857, UISPP Proceedings of the XV World Congress, vol 18, (Early Neolithic in the Iberian Peninsula): 3-10, 2008
The site of Portalón at Cueva Mayor, located in the Sierra de Atapuerca (Burgos, Spain), is an im... more The site of Portalón at Cueva Mayor, located in the Sierra de Atapuerca (Burgos, Spain), is an important Holocene archaeological site that was excavated in the 70’s but from which little has been published. New excavations starting in 2000 have
highlighted a deep stratigraphical sequence with human occupations starting in the beginning of the Upper Pleistocene. In this paper, we present for the first time this stratigraphical sequence with a set of radiocarbon datings comprising from 30.000 BP to 2000 BP.
Actas IV congreso Neolítico Peninsular (2006) Tomo I. MARQ. Diputación Provincial de Alicante , 2008
Quaternary climatic changes and eviromental crises in the Mediterranean., 2003
In this paper we present the obtained results from Portalón of Cueva Mayor (Sierra de Atapuerca, ... more In this paper we present the obtained results from Portalón of Cueva Mayor (Sierra de Atapuerca, Burgos, Spain) which have allowed to reconstruct the vegetation composition as well as its relation with the climate and the human habitation of the site during 2000 years, from ca. 4000 to ca. 2000 yr. BP. An open landscape with Corylus, Juglans and Betula was developed at the base of the sequence, from 3910 ± 70 yr. BP to after 3680 ± 40 yr. BP (Pollen Zone I), which reflects humid and temperated climatic conditions. Before 3330 ± 70 yr. BP a mediterranean climate can be inferred by the presence of Olea and evergreen Quercus, with drier and warmer climatic conditions, leading to the expansion of shrub vegetation. The human activity is clearly detected along Portalón pollen sequence and the evidences of anthropogenic deforestation are shown by the presence of microcharcoal particles.
PLoS ONE, 2014
The archaeological karstic infill site of Galería Complex, located within the Atapuerca system (S... more The archaeological karstic infill site of Galería Complex, located within the Atapuerca system (Spain), has produced a large faunal and archaeological record (Homo sp. aff. heidelbergensis fossils and Mode II lithic artefacts) belonging to the Middle Pleistocene. Extended-range luminescence dating techniques, namely post-infrared infrared stimulated luminescence (pIR-IR) dating of K-feldspars and thermally transferred optically stimulated luminescence (TT-OSL) dating of individual quartz grains, were applied to fossil-bearing sediments at Galería. The luminescence dating results are in good agreement with published chronologies derived using alternative radiometric dating methods (i.e., ESR and U-series dating of bracketing speleothems and combined ESR/U-series dating of herbivore teeth), as well as biochronology and palaeoenvironmental reconstructions inferred from proxy records (e.g., pollen data). For the majority of samples dated, however, the new luminescence ages are significantly (,50%) younger than previously published polymineral thermoluminescence (TL) chronologies, suggesting that the latter may have overestimated the true burial age of the Galería deposits. The luminescence ages obtained indicate that the top of the basal sterile sands (GIb) at Galería have an age of up to ,370 thousand years (ka), while the lowermost sub-unit containing Mode II Acheulean lithics (base of unit GIIa) was deposited during MIS 9 (mean age = 313614 ka; n = 4). The overlying units GIIb-GIV, which contain the richest archaeopalaeontological remains, were deposited during late MIS 8 or early MIS 7 (,240 ka). Galería Complex may be correlative with other Middle Pleistocene sites from Atapuerca, such as Gran Dolina level TD10 and unit TE19 from Sima del Elefante, but the lowermost archaeological horizons are ,100 ka younger than the hominin-bearing clay breccias at the Sima de los Huesos site. Our results suggest that both pIR-IR and single-grain TT-OSL dating are suitable for resolving Middle Pleistocene chronologies for the Sierra de Atapuerca karstic infill sequences.
Frontiers in Behavioral Neuroscience, 2015
† These authors have contributed equally to this work.
El karst de Ojo Guareña (Merindad de Sotoscueva, Burgos) contiene un amplio y variado conjunto de... more El karst de Ojo Guareña (Merindad de Sotoscueva, Burgos) contiene un amplio y variado conjunto de manifestaciones artísticas rupestres que abarca momentos paleolíticos y de la Prehistoria reciente. Las recientes actividades arqueológicas se han enfocado a la documentación, registro y análisis de uno de sus conjuntos, la Sala de la Fuente, donde se localiza un importante conjunto de grabados post-paleolíticos del cual se presentan aquí unas primeras valoraciones técnicas y formales. Las excepcionales condiciones de conservación y de contextualización del dispositivo iconográfico y de su entorno, han permitido obtener unas primeras dataciones indirectas para encuadrar el momento de ejecución de los grabados, haciendo referencia los resultados a un espectro cronológico variable entre momentos finales del Neolítico y las fases finales del Calcolítico.
on motivo de la realización, por parte del Ayuntamiento de Lerma, de unas obras, junto al número ... more on motivo de la realización, por parte del Ayuntamiento de Lerma, de unas obras, junto al número 3 de la calle de la Paloma, tendentes a solventar una fuga de agua, se produjo un hundimiento de la calzada, apareciendo una cavidad que, en principio, se pensó podría tratarse de una antigua bodega o subterráneo artificial.
La comarca de Juarros constituye un ámbito geográfico situado a unos 20 km al sureste de la capit... more La comarca de Juarros constituye un ámbito geográfico situado a unos 20 km al sureste de la capital. Se accede desde la carretera N-120 al tomar, a la altura del P.K. 101,5, la carretera BU-V-8001 y, una vez superado el puente sobre el río Arlanzón en San Millán de Juarros, debe continuarse por la carretera BU-V-8002 cuyo trazado sigue el valle del río Cueva hasta llegar al pueblo del mismo nombre, punto alrededor del cual se sitúan la mayoría de las cavidades objeto de este artículo.
The site of Galería del Sílex, part of the Atapuerca complex in Burgos, Spain, is exceptional for... more The site of Galería del Sílex, part of the Atapuerca complex in Burgos, Spain, is exceptional for the conditions of its discovery, as well as for the good state of preservation of the graphic manifestations and archaeological assemblage it contains. As a result, it has been possible to learn about
some of the burial practices and ritual behavior of the Bronze Age societies that lived in this region. Certain charcoal-drawn figures have been found in the Galería del Sílex, a rare form for Post-Paleolithic rock art, that is commonly dominated by engravings and red paintings located in open-air sites or rockshelters. Under the exceptional cave conditions, we
have obtained dates of 3,530±110 yr BP and 3,670±40 yr BP for Galería del Sílex drawings, representing one of the first
results of this kind obtained for Post-Palaeolithic rock art in Western Europe. These results provide us with a solid evidence for the development of graphic manifestations in early complex societies and bring into question previous stylistic proposals, that were mainly based on artistic
arguments and comparisons with limited ceramic decorated assemblages."
BAR International Series, (1857, Archaeopress, Oxford), 1857, UISPP Proceedings of the XV World Congress, vol 18, (Early Neolithic in the Iberian Peninsula): 3-10, 2008
The site of Portalón at Cueva Mayor, located in the Sierra de Atapuerca (Burgos, Spain), is an im... more The site of Portalón at Cueva Mayor, located in the Sierra de Atapuerca (Burgos, Spain), is an important Holocene archaeological site that was excavated in the 70’s but from which little has been published. New excavations starting in 2000 have
highlighted a deep stratigraphical sequence with human occupations starting in the beginning of the Upper Pleistocene. In this paper, we present for the first time this stratigraphical sequence with a set of radiocarbon datings comprising from 30.000 BP to 2000 BP.
Actas IV congreso Neolítico Peninsular (2006) Tomo I. MARQ. Diputación Provincial de Alicante , 2008
Quaternary climatic changes and eviromental crises in the Mediterranean., 2003
In this paper we present the obtained results from Portalón of Cueva Mayor (Sierra de Atapuerca, ... more In this paper we present the obtained results from Portalón of Cueva Mayor (Sierra de Atapuerca, Burgos, Spain) which have allowed to reconstruct the vegetation composition as well as its relation with the climate and the human habitation of the site during 2000 years, from ca. 4000 to ca. 2000 yr. BP. An open landscape with Corylus, Juglans and Betula was developed at the base of the sequence, from 3910 ± 70 yr. BP to after 3680 ± 40 yr. BP (Pollen Zone I), which reflects humid and temperated climatic conditions. Before 3330 ± 70 yr. BP a mediterranean climate can be inferred by the presence of Olea and evergreen Quercus, with drier and warmer climatic conditions, leading to the expansion of shrub vegetation. The human activity is clearly detected along Portalón pollen sequence and the evidences of anthropogenic deforestation are shown by the presence of microcharcoal particles.