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Organic matter accumulation during the Holocene in the Guadalquivir marshlands (SW Spain) by José E. Ortiz; Trinidad Torres; José E. López‐Pamo; Vicente Soler; Juan F. Llamas; Daniel Barettino; María J. García is a Earth and Planetary Sciences article available to read on EtoBox.

What is Organic matter accumulation during the Holocene in the Guadalquivir marshlands (SW Spain) about?

## Abstract The distribution of biomarker compounds and magnetic susceptibility observed in the sediment from a 20 m core drilled in the marshlands of the estuarine region of the Guadalquivir River (southwest coast of Spain) has allowed us to reconstruct the palaeoenvironmental evolution of this area during the Holocene. Several organic compounds (__n‐__alkanes, __n‐__ketones, __n‐__alkanols, __n‐__alkanoic acids and organic sulphur), as well as different biomarker ratios, have been used to show changing environmental conditions through time. These geochemical proxies suggest good preservation of the organic matter, although some diagenesis has occurred to particular organic compounds, especially the __n‐__alkanoic acids. Our data indicate a major allochthonous supply of terrestrial plants, with less influence from aquatic plants or algae through the core. There are markedly different palaeoenvironmental conditions between the uppermost 5 m (last 6 ka cal. B.P.) and the rest of the core. From 5 m (__ca__ 6 ka cal. B.P.) to 19 m (__ca__ 8 ka cal. B.P.) depth the palaeoenvironmental conditions were almost constant. Based on organic sulphur content and __n‐__alkane content logs, anoxi

Who reads Organic matter accumulation during the Holocene in the Guadalquivir marshlands (SW Spain)?

Author

José E. Ortiz; Trinidad Torres; José E. López‐Pamo; Vicente Soler; Juan F. Llamas; Daniel Barettino; María J. García

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0072-1050)

Published

2007

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)