Juan C. Larrasoaña

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Astronomically forced insolation changes have driven monsoon dynamics and recurrent humid episodes in North Africa, resulting in green Sahara Periods (GSPs) with savannah expansion throughout most of the desert. Despite their potential for expanding the area of prime hominin habitats and favouring out-of-Africa dispersals, GSPs have not been incorporated(More)
Distinct magnetic properties of marine sediments that record the Palaeocene–Eocene thermal maximum (PETM) have been suggested to be due to a bacterial magnetofossil signal that is linked to enhanced weathering conditions during the PETM. We document the dominance of bacterial magnetite in deep-sea sediments from southern Kerguelen Plateau (Ocean Drilling(More)
Although recent studies have revealed more widespread occurrences of magnetofossils in pre-Quaternary sediments than have been previously reported, their significance for paleomagnetic and paleoenvironmental studies is not fully understood. We present a paleo- and rock-magnetic study of late Miocene marine sediments recovered from the Guadalquivir Basin (SW(More)
Citation: Larrasoaña JC, Roberts AP, Liu Q, Lyons R, Oldfield F, Rohling EJ and Heslop D (2015) Source-to-sink magnetic properties of NE Saharan dust in Eastern Mediterranean marine sediments: review and paleoenvironmental implications. Front. Earth Sci. 3:19. doi: 10.3389/feart.2015.00019 Source-to-sink magnetic properties of NE Saharan dust in Eastern(More)
We introduce a method and software to process demagnetization data for a rapid and integrative estimation of characteristic remanentmagnetization (ChRM) components. The virtual directions (VIDI) of a paleomagnetic site are “all” possible directions that can be calculated from a given demagnetization routine of “n” steps (being m the number of specimens in(More)
1 Unidad de Zaragoza, Instituto Geológico y Minero de España, Zaragoza, Spain, 2 Paleomagnetic Laboratory CCiTUB-CSIC, Institute of Earth Sciences Jaume Almera, Barcelona, Spain, 3 Departamento de Química Analítica, Universidad del País Vasco, Bilbao, Spain, 4 Departamento de Estratigrafía y Paleontología, Universidad del País Vasco, UPV/EHU, Bilbao, Spain,(More)
BACKGROUND We describe the first occurrence in the fossil record of an aquatic avian twig-nest with five eggs in situ (Early Miocene Tudela Formation, Ebro Basin, Spain). Extensive outcrops of this formation reveal autochthonous avian osteological and oological fossils that represent a single taxon identified as a basal phoenicopterid. Although the eggshell(More)
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