A Pliocene mega-tsunami deposit and associated features in the Ranquil Formation, southern Chile

Roux, J.P. Le; Nielsen, Sven N.; Kemnitz, Helga; Henríquez, Álvaro

doi:10.1016/j.sedgeo.2007.12.002

Cited by 46 publications

(29 citation statements)

References 47 publications

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“…This is confirmed by the occurrence of high-pressure forceful injection structures observed at the bedrock contact (Fig. 7a), prob ably due to the violent impact of the flow against an obstacle (see LE Roux et al 2008). …”

Section: Environmental Interp Retati Onsupporting

confidence: 57%

Tsunami vs. storm surge deposits: a review of the sedimentological and geomorphological records of extreme wave events (EWE) during the Holocene in the Gulf of Cadiz, Spain

Lario¹,

Luque²,

Cardeña³

et al. 2010

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SlUlll ll ary.Sedimentological and palaeoecological observations, accompanied by archaeological determinations and absolute dating, have been carried out on a recent beach-barrier system succes sion located 20 km south of Siracusa, south-eastern Ionian coast of Sicily (Italy) . These deposits fi ll the back edge of a ria incised within Miocene limestones and are composed of three main stratal units characterized by distinct sedimentological fe atures. The two lower units, fo rmed by cross bedded sands and laminated days, recorded the development of a small confined beach-barrier depo sitional system, influenced by fr equent high-energy events. The upper unit, represented by chaotic coarser sediments, can be attributed to a destructive marine high-energy event. The physical prop erties of the composing stratal units and the morphological setting of the study area allowed us to reconstruct a suite of storm-and tsunami-related marine depositional processes that might have occurred in recent times along this area of elevated seismicity. In particular, absolute dating and archaeological determinations allow correlating the upper unit to a tsunami wave triggered by the 1693 AD catastrophic earthquake. The same depositional mechanism can also account for some of the coarse levels occurring into the underlying stratal units.

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Section: Environmental Interp Retati Onsupporting

confidence: 57%

Tsunami vs. storm surge deposits: a review of the sedimentological and geomorphological records of extreme wave events (EWE) during the Holocene in the Gulf of Cadiz, Spain

Lario¹,

Luque²,

Cardeña³

et al. 2010

zfg_suppl

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“…To rip a block from the substrate, rolling certainly would not do the trick, and it is difficult to envisage these huge boulders bouncing along in any flow. On the other hand, mega-breccias with large rip-up clasts are known at various localities along the Chilean coastline where they are not associated with basement boulders (e.g., Le Roux et al, 2004Roux et al, , 2008. Encinas et al (2014) accept that 'some of the Navidad Formation may be of deltaic origin', with which we concur.…”

Section: Sedimentary Environment Of the Navidad Formationsupporting

confidence: 65%

Reply to Comment of Encinas et al. (2014) on: ‘Evidence for an Early-Middle Miocene age of the Navidad Formation (central Chile): Paleontological, climatic and tectonic implications’ of Gutiérrez et al. (2013, Andean Geology 40 (1): 66-78).

Roux

Gutiérrez

Hinojosa

et al. 2014

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“…Esta última característica se asocia probablemente al origen de los granos desde antiguas líneas de playa, actualmente emergidas (Higgs, 1979). Las texturas de disolución observadas en las partículas son interpretadas como el resultado de una estadía larga sin disturbios, pero afectada por procesos pedogenéticos durante la permanencia de los granos en el suelo de la pampa (Le Roux et al, 2008).…”

Section: Aspectos Sedimentológicos De Las Partículas Transportadasunclassified

Estacionalidad de la erosion y el transporte eolico de particulas en el desierto costero de Atacama, Chile (23°S).

Flores‐Aqueveque¹,

Vargas²,

Rutllant³

et al. 2009

Andgeo

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RESUMEN.La costa del Desierto de Atacama se caracteriza por la ocurrencia de vientos fuertes del sur y suroeste. El clima árido, la geomorfología plana y las características granulométricas de los depósitos superficiales de la Pampa Mejillones, ubicada en la costa del norte de Chile (23ºS), favorecen el estudio de los procesos de erosión y transporte eólico de partículas en este desierto costero. Mediciones in situ del flujo horizontal de partículas (G) y de vientos, junto con análisis sedimentológicos de la capa superficial de esta pampa, permitieron determinar los parámetros relevantes en el proceso de erosión y transporte eólico de partículas, así como estimar su estacionalidad. Se determinó un coeficiente de rugosidad superficial (z 0 ) promedio del orden de 10 -3 m, típico de planicies desérticas. Estacionalmente se observaron valores de G de hasta 2.100 g cm -1 mes -1 asociados a velocidades de fricción (u*) entre 0,4 y 0,5 m s -1 durante la primavera del año 2000. Resultados similares se obtuvieron para los años 1999 y 2001. La sedimentología (granulometría y textura superficial) y mineralogía de las partículas del suelo y del material capturado en las trampas de polvo, permitieron determinar que la fracción transportada está caracterizada principalmente por cuarzo y feldespatos, y modas granulométricas entre 75 y 1.000 µm, similares a las observadas en los sedimentos cercanos y al sur (viento arriba) del área de captura. Los resultados obtenidos y la correlación preliminar entre los vientos medidos en distintas estaciones meteorológicas en la península de Mejillones, permiten establecer una relación directa entre el flujo horizontal de partículas hacia la bahía homónima y los vientos regionales del sur-suroeste, especialmente durante los meses de primavera y verano, en concomitancia con la intensificación de los vientos favorables a la surgencia costera en el área oceánica adyacente. ABSTRACT. Seasonality of erosion and eolian particle transport in the coastal Atacama Desert, Chile (23ºS).The coast of the Atacama Desert is characterized by the occurrence of strong south-and southwesterly winds. The arid climate, flat geomorphology and the characteristics of the superficial sediments on Pampa Mejillones, located in northern Chile (ca. 23°S), favor the study of eolian erosion and transport processes in this coastal desert. In situ measurements of the horizontal particle flux (G) and winds in the area, together with sedimentological analyses of the uppermost part of the pampa sediments, allowed determination of the significant parameters in the eolian erosion and particle transport process and its seasonality. A local surface roughness parameter (z 0 ) of about 10 -3 m was calculated, which is a typical value of desert plains. Seasonally, values of G up to 2,100 g cm -1 month -1 were observed, associated with friction velocities (u*) between 0,4 and 0,5 m s -1 during the spring of 2000. Similar results were obtained for the years 1999 and 2001. The sedimentology (granulometry and surface texture) and miner...

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A Pliocene mega-tsunami deposit and associated features in the Ranquil Formation, southern Chile

Cited by 46 publications

References 47 publications

Tsunami vs. storm surge deposits: a review of the sedimentological and geomorphological records of extreme wave events (EWE) during the Holocene in the Gulf of Cadiz, Spain

Tsunami vs. storm surge deposits: a review of the sedimentological and geomorphological records of extreme wave events (EWE) during the Holocene in the Gulf of Cadiz, Spain

Reply to Comment of Encinas et al. (2014) on: ‘Evidence for an Early-Middle Miocene age of the Navidad Formation (central Chile): Paleontological, climatic and tectonic implications’ of Gutiérrez et al. (2013, Andean Geology 40 (1): 66-78).

Estacionalidad de la erosion y el transporte eolico de particulas en el desierto costero de Atacama, Chile (23°S).

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