jueves, 21 de junio de 2012

Nueva lección sobre evolución humana de la Cátedra Tomás Pascual Sanz-CENIEH

Esta mañana se ha presentado en el Salón de Actos del CENIEH el libro “Visiones del Ser Humano. Del Pasado al Presente”, tercer volumen de la colección sobre evolución humana que recoge las actividades anuales organizadas por la Cátedra Tomás Pascual Sanz-CENIEH, y que este año incluye 22 ponencias de científicos de la talla de Carles Lalueza, Manuel Martín-Loeches, Arcadi Navarro o Joâo Zilhâo....
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CENIEH

New deglaciation data opens door for earlier First Americans migration

CORVALLIS, Ore. - A new study of lake sediment cores from Sanak Island in the western Gulf of Alaska suggests that deglaciation there from the last Ice Age took place as much as1,500 to 2,000 years earlier than previously thought, opening the door for earlier coastal migration models for the Americas.

The Sanak Island Biocomplexity Project, funded by the National Science Foundation, also concluded that the maximum thickness of the ice sheet in the Sanak Island region during the last glacial maximum was 70 meters – or about half that previously projected – suggesting that deglaciation could have happened more rapidly than earlier models predicted.

Results of the study were just published in the professional journal, Quaternary Science Reviews.

The study, led by Nicole Misarti of Oregon State University, is important because it suggests that the possible coastal migration of people from Asia into North America and South America – popularly known as "First Americans" studies – could have begun as much as two millennia earlier than the generally accepted date of ice retreat in this area, which was 15,000 years before present.

Well-established archaeology sites at Monte Verde, Chile, and Huaca Prieta, Peru, date back 14,000 to 14,200 years ago, giving little time for expansion if humans had not come to the Americas until 15,000 years before present – as many models suggest.

The massive ice sheets that covered this part of the Earth during the last Ice Age would have prevented widespread migration into the Americas, most archaeologists believe.

"It is important to note that we did not find any archaeological evidence documenting earlier entrance into the continent," said Misarti, a post-doctoral researcher in Oregon State's College of Earth, Ocean, and Atmospheric Sciences. "But we did collect cores from widespread places on the island and determined the lake's age of origin based on 22 radiocarbon dates that clearly document that the retreat of the Alaska Peninsula Glacier Complex was earlier than previously thought."

"Glaciers would have retreated sufficiently so as to not hinder the movement of humans along the southern edge of the Bering land bridge as early as almost 17,000 years ago," added Misarti, who recently accepted a faculty position at the University of Alaska at Fairbanks...
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EurekAlert

Super-volcano may have doomed Neanderthals

Italian 'super-eruption' was possibly more devastating that previously thought

A super-eruption of an Italian volcano that may have played a major role in the Neanderthals' fate was apparently even larger than thought, new research suggests.

For the new study, scientists investigated the Campi Flegrei caldera volcano in southern Italy. About 39,000 years ago, it experienced the largest volcanic eruption that Europe has seen in the last 200,000 years. This super-eruption may have played a part in wiping out or driving away Neanderthal and modern human populations in the eastern Mediterranean.

To learn more about this outburst, scientists measured 115 sites for the ash layer it laid down, known as Campanian Ignimbrite. They next analyzed this data with a 3D ash-dispersal computer model.

The researchers discovered the super-eruption behind the Campanian Ignimbrite would have spewed 60 to 72 cubic miles (250 to 300 cubic kilometers) of ash across 1.4 million square miles (3.7 million square km). This is twice to triple the previous estimate of the volume of ash spouted by the eruption.

These findings, detailed online May 30 in the journal Geophysical Research Letters, suggest the super-eruption would have spread up...
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Aerial photograph of the Campi Flegrei caldera. The structure, formed during the Campanian Ignimbrite super-eruption, lies west of the city of Naples, Italy.





MSNBC.com

Fuente Mudarra cubre las lagunas temporales de Atapuerca

El yacimiento al aire libre registra la época de 150.000 a 100.000 de la que no hay vestigios

Explicar la evolución del hombre y su historia desde hace más de 1,3 millones de años es el gran valor de los yacimientos de Atapuerca. Pero hasta ahora existen algunos periodos de tiempo sin información. El nuevo y modesto yacimiento Fuente Mudarra se ha convertido en clave para cerrar una pequeña laguna temporal de la evolución en la sierra que abarca desde los 150.000 a los 100.000 años. «Es una parte que no se corresponde con nada en la Sierra» apunta la responsable del trabajo en Fuente Mudarra la burgalesa Marta Navazo, profesora de la Universidad de Burgos e investigadora del Cenieh. Este yacimiento, tiene una cronología de 70.000 años en su parte superior y con dos metros de profundidad roza los 200.000 años de antigüedad en la parte más baja.

En estos primeros días entre nueve y 12 arqueólogos, la mayoría estudiantes del Grado de Prehistoria y Patrimonio de la UBU, se ufanan en desbrozar una superficie de 24 metros cuadrados. Es la parte superior estéril y con restos «descontextualizados» que no sirven para el trabajo arqueológico. A pesar de ello ya han localizado en estos niveles superiores «cuarcita y sílex, alguna lasca y alguna raedera». El trabajo se mantendrá hasta mediados de julio en Fuente Mudarra uno de los 180 yacimientos al aire libre localizados en una prospección realizada por alumnos de la UBU y que se saldó con la concreción de 15 con sedimento. La elección de los mismos responde a una estrategia de excavación....
... Correo de Burgos

Actualización 23-06-12: Vídeo (21/06/2012 por cyltelevision). Hallan un nuevo asentamiento prehistórico en Atapuerca. Ver en Paleo Vídeos > Prehistoria de España y Portugal > L.R.1.5 nº 26.

Actualización 08-08-12: Vídeo (08/08/2012 por Historias deantesdelahistoria). Entrevista a Marta Navazo. Ver en Paleo Vídeos > Prehistoria de España y Portugal > L.R.1.5 nº 49.

Tecnologías de Información Geográfica aplicadas al estudio del Arte Rupestre en la Zona Sur de la Península Ibérica

Bastos Zarandieta, Ángel David (Universidad de Cádiz)
Moreno Márquez, Adolfo (Universidad de Cádiz)
Publicado en: Estrat crític, Vol. 5, Núm. 1 (2011) , p. 42-47, ISSN 1887-8687

Resumen: Jornadas de Jóvenes en Investigación Arqueológica, JIA (3as : 5-7 de mayo 2010 : Universitat Autònoma de Barcelona). Sesión 1. Nuevas perspectivas de Arte Rupestre.

Resumen: En este artículo, y como hicieron también nuestros compañeros de sesión, aparte de realizar una descripción de las pinturas, con su significado, posible funcionalidad, todo lo que, en las distintas publicaciones, se ha dicho sobre ellas, utilizamos las nuevas tecnologías y los SIG para situarlos en el contexto de su entorno y ampliar así nuestro conocimiento sobre ellas.

Resumen: In this article, and as our companions also did, apart from conducting a description of the paintings, with their meaning, possible functionality, everything that in the various publications has been said about them, we used new technologies and GIS to locate them in the context of their environment and thus extend our knowledge about them.

Resumen: En aquest article, i com van fer també els nostres companys de sessió, a part de realitzar una descripció de les pintures, amb el seu significat, possible funcionalitat, tot el que, en les diferents publicacions, s'ha dit sobre elles, utilitzem les noves tecnologies i els SIG per situar-los en el context del seu entorn i ampliar així el nostre coneixement sobre elles.

Texto completo > Depósito Digital de Documentos de la UAB

Conoce las técnicas y programas informáticos para estudiar fósiles



Vídeo el 21/06/2012 por museoevolucionhumana añadido a Paleo Vídeos > Prehistoria de España y Portugal > L.R.1.5 nº 24.

Acompañado de los científicos del Centro Nacional sobre la Evolución Humana (CENIEH) Emiliano Bruner y José Manuel de la Cuétara podremos conocer las técnicas y programas informáticos utilizados hoy para estudiar fósiles. En este vídeo, cedido por Radiotelevisión Castilla y León, podemos ver las características de este taller para mayores de 16 años, organizado por el Museo de la Evolución Humana.

Welsh people could be most ancient in UK, DNA suggests

Welsh people could lay claim to be the most ancient Britons, according to scientists who have drawn up a genetic map of the British Isles.

Research suggests the Welsh are genetically distinct from the rest of mainland Britain.

Professor Peter Donnelly, of Oxford University, said the Welsh carry DNA which could be traced back to the last Ice Age, 10,000 years ago.

The project surveyed 2,000 people in rural areas across Britain.

Participants, as well as their parents and grandparents, had to be born in those areas to be included in the study.

Prof Donnelly, a professor of statistical science at Oxford University and director of the Wellcome Trust centre for human genetics, said DNA samples were analysed at about 500,000 different points.
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bbc.co.uk

The “Venus” of Mauern

... The figurine was found in the Gravettian layers, dated to 29 k.a. BP on 24th August 1948. The lithic industry has affinities both to the Pavlovien and eastern Gravettian at Kostenki (Microgravettes, Flechettes, splintered pieces which are only known from the eastern Gravettian) but ther are also affinities to the Swabian sites on the basis of similar kinds of personal ornaments, in particular the presence of abundant ivory pendants of tear-drop shape known also from the Gravettian layers of the  Brillenhöhle, and the Obere Klause near Kelheim.

The so called “Rote von Mauern” is a 72 mm tall, red ochre colored limestone figurine, found on the outer slope between cavities two and three. In the 1950-80ies there were unverified stories, that the figure could be a fake. A detailled report to exclude this possibility has unfortunately never been published. This figurine can be read in different ways: as a stylized woman but it have also elements of a phallic figure...
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Aggsbach's Paleolithic Blog
Relacionado: Especiales > Paleo Venus > Alemania

El juego de Atapuerca



Vídeo el 21/06/2012 por cyltelevision añadido a Paleo Vídeos > Prehistoria de España y Portugal > L.R.1.5 nº 23.

Los playmobil se atreven también a colaborar en las excavaciones de Atapuerca.