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Lario Gómez, Javier

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0000-0002-2582-5354
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Lario Gómez
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Javier
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2019 - 201912020 - 20221
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Autor: Costa, Pedro J.M. ×

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Mostrando 1 - 2 de 2
  • Miniatura
    Publicación
    Tsunami Deposits in Atlantic Iberia: A Succinct Review
    (Springer nature, 2022-06-23) Costa, Pedro J.M.; Reicherter, Klaus R.; Lario Gómez, Javier
    This chapter offers an overview of the current knowledge of the southwest Iberian tsunami geological record. Specifically, this chapter summarizes three decades of research on tsunami and storm deposit recognition, differentiation and establishing chronologies of past events. The impact and signature of the CE 1755 within coastal stratigraphic units are impressive, and its study in such a wide spatial area has provided very useful insights into tsunami dynamics. Another peculiarity addressed in this chapter is the contrast between the diverse record of tsunami or storm imprints on the Spanish part of the Gulf of Cadiz when compared with the Portuguese area. This discrepancy essentially relates to the dominance of aggrading or eroding processes favouring the preservation of deposits and also with different sediment availability during the Holocene. This allowed for a better correlation between the Spanish tsunami onshore record and its turbidite data. However, some of the deposits previously described are controversial not only sedimentologically but also because of constraints on the dates obtained. Therefore, further work is necessary on both sides of the border to establish indisputably return periods and to define a catalogue of past tsunami events affecting the southwest Iberian Peninsula during the Holocene.
  • Miniatura
    Publicación
    The importance of coastal geomorphological setting as a controlling factor on microtextural signatures of the 2010 Maule (Chile) tsunami deposit
    (Universidad Politécnica de Barcelona, 2019) Costa, Pedro J.M.; Rasteiro da Silva, D.; Figueirinhas, Leonor; Lario Gómez, Javier
    Quartz grains collected from Arauco and Mataquito (central Chile) after the 2010 Maule tsunami presented an overwhelming dominance of dissolution textures. The analysis of superficial imprints proved that some grains were mechanically impacted before deposition. However, the percentage of grains with fresh surfaces and percussion marks was significantly lower than average values from other tsunami deposits elsewhere in the world. In this work, we discuss the reasons for such results in the context of the geomorphological setting of the areas analyzed and its influence on the microtextural signatures observed. The data presented in this study evidences a geographic dependence in the type of microtextures in the areas analyzed. For example, in Arauco the abundance of dissolution textures decreases rapidly towards the center of the embayment and increases towards the rocky headlands of its westernmost sector. By contrast, an increase of mechanical marks (e.g. fresh surfaces) is observed in the central region of the Arauco’s embayment. Similarly, in Mataquito, dissolution features are more abundant in the headlands or small capes, while there is a higher presence of mechanical marks in sandy embayments. The results of this study demonstrate the importance of the geomorphological context as a controlling factor in the intensity of mechanical imprints on the surface of quartz grains transported by tsunamis and deposited in the inner shelf and coastal areas. Therefore, our results suggest that without a detailed geomorphological contextualization microtextural discrimination can lead to misleading interpretations. Hence, there is a need for more microtextural analysis on tsunami deposits in order to assess the variability in the geographic distribution and intensity of microtextures imprinted on the surface of quartz grains deposited during a tsunami event.