17 documents found, page 1 of 2

From a marsh that was once sea: the geological evolution of Europe's largest bi...

This paper presents an updated list of benthic foraminifera found in brackish and marine (paleo-)environments of the Donana National Park (SW Spain) from the Lower Pliocene to the present-day. This list, based on published records, includes ninety-four species whose autoecology and temporal distribution in surface sections and continuous sediment cores allow us to infer the palaeogeographic evolution of this Bi...

El contraste micropaleontológico de la Historia: el Lacus Ligustinus romano

During the Roman period (3rd century BC-5th century AD), the areas located near the present-day mouth of the Guadalquivir River were occupied by a lagoon with marine connection, according to the paleoenvironmental interpretation of benthic foraminiferal assemblages obtained in a core extracted in the Donana National Park. The inner zones of this lagoon were occupied by clayey tidal flats, which suffered the eff...

Relationship between substrate, physico-chemical parameters and foraminiferal t...

A multidisciplinar analysis of sediments collected in diferent environments of the Doñana National Park (Guadalquivir estuary, SW Spain) provides an overview of the textural, mineralogical and physico-chemical parameters that control the distribution of benthic foraminiferal tests in this Biosphere Reserve. These microorganisms are absent in the fne quartzitic sands that constitute the substrate of temporary po...

Magnetic fingerprint of southern Portuguese speleothems and implications for pa...

Environmental magnetism of speleothems is still in its early stage of development. Here we report on our investigation of the environmental and paleomagnetic information that has been recorded in speleothems, and what are the factors that control its preservation and reliability. To address these issues, we used a multidisciplinary approach, including rock magnetism, petrography, scanning electron microscopy, s...

Testing rock magnetic and AMS method in tsunami and storm-induced deposits

Testing rock magnetic and AMS method in tsunami and storm-induced deposits

Benchmarks and sediment source(s) of the 1755 Lisbon tsunami deposit at Boca do...

Standardizing the signature of tsunami deposits has been identified as a major limitation for the identification of paleo-tsunami deposits. This limitation mostly arises from the strongly source-dependent nature of these deposits, which in turn determines their composition and depositional architecture, and from the effect of the local morphology of the corresponding depositional environment. Here, we provide n...

Identification of tsunami deposits and their impact on coastal zones : a study ...

Benchmarks, sediment source and hydrodynamics of the 1755 Lisbon tsunami deposi...

Identification of Tsunami deposits and their impact on coastal zones : a study ...

Tsunamis are unforeseeable phenomena and therefore one of the most devastating natural disasters in terms of human and economic losses. Their impact on coastal and nearshore zones is substantial and need to be accurately evaluated to improve their prevention and management. In the last decades, numerous investigations focused on the identification of paleotsunamis in order to evaluate their frequency in the geo...