Tsunami-induced conglomerates in Miocene upper bathyal deposits, Chita Peninsula, central Japan

Shiki, Tsunemasa; Yamazaki, T.

doi:10.1016/0037-0738(95)00127-1

Cited by 88 publications

(38 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the literature, tsunami action is reported as being responsible for the formation of large erosion surfaces in shallow marine environments, and for deposition in transitional environments (Shiki et al 2000). Marine deposition related to tsunami events is reported mainly in abyssal and bathyal environments (Kastens and Cita 1981;Shiki and Yamazaki 1996): all these sedimentary features are absent in the succession described in the present study.…”

Section: Origin Of the Soft-sediment Deformation Structuresmentioning

confidence: 69%

Liquefaction and fluidization structures in Messinian storm deposits (Bajo Segura Basin, Betic Cordillera, southern Spain)

Alfaro

Delgado

Estévez

et al. 2002

Int J Earth Sci (Geol Rundsch)

146

View full text Add to dashboard Cite

Synsedimentary deformation structures are recognized in Upper Miocene deposits of the eastern Betic Cordillera (SE Spain). A singular stratigraphic section in these deposits shows several levels with soft-sediment deformation structures (load casts, ball-and-pillows and pipes) induced by liquidization (liquefaction and/or fluidization) of sandy sediments. The morphologic analysis of these structures reveals a liquidized sediment thickness ranging from 0.1 to 1.5 m. Although they have been previously interpreted as a result of seismic shocks, their origin was most likely related to the action of storm waves as the structures are always associated with tempestites. Facies analysis, geometrical features of the deformed beds and appraisal of geotechnical properties for shelf and coastal sediments allow the soft-sediment deformation structures to be interpreted as a result of the cyclic effect of storm waves on unconsolidated sediments, and excludes other processes such as overloading, tsunamis or the impact of breaking waves.

show abstract

Section: Origin Of the Soft-sediment Deformation Structuresmentioning

confidence: 69%

Liquefaction and fluidization structures in Messinian storm deposits (Bajo Segura Basin, Betic Cordillera, southern Spain)

Alfaro

Delgado

Estévez

et al. 2002

Int J Earth Sci (Geol Rundsch)

146

View full text Add to dashboard Cite

show abstract

“…Following the mentioned tsunami events, numerous studies were carried out (Engel and Brückner 2011), mainly on the onshore effects (e.g., Engel and Brückner 2011;Spiske et al 2013), while offshore investigations, requiring ship cruises and coring, were far fewer in number (Dawson and Stewart 2007;Noda et al 2007;Sakuna et al 2012;Goto et al 2012;Fujiwara and Kamataki 2007;Ikehara et al 2014). On the other hand, most suspected tsunami deposits in the fossil record occur in marine shelf sediments, particularly isolated sandstone layers and enigmatic conglomerate beds (e.g., Shiki and Yamazaki 1996;Bussert and Aberhan 2004), which remain difficult to interpret without well-investigated present-day counterparts (Dawson and Stewart 2007). This also applies to the Monotis-Dactylioceras Bed of the Posidonienschiefer Formation.…”

mentioning

confidence: 93%

The Monotis–Dactylioceras Bed in the Posidonienschiefer Formation (Toarcian, southern Germany): condensed section, tempestite, or tsunami-generated deposit?

Arp

Gropengießer

2015

PalZ

View full text Add to dashboard Cite

The Monotis-Dactylioceras Bed in the Toarcian Posidonienschiefer Formation is a conspicuous shell accumulation, which was used as marble in the late eighteenth century of Bavaria. The shell bed is characterized by left valves of the bivalve Meleagrinella substriata (von Münster) and local accumulations of the ammonite Dactylioceras athleticum (Simpson), and has previously been considered to reflect a regression or a storm event. Indeed, three different interpretations of the bed appear possible: (1) condensed section, (2) tempestite, or (3) tsunami deposit. New observations, specifically swaley crossstratification and sole marks, point to an event-like formation of the bed. While most of the observations are consistent with the formation by a storm event, the singular occurrence within the 4.4 Ma lasting Lower Toarcian, which spanned about 4.4 Ma, and the inverse grading of the shells point to a possible tsunami origin. The latter hypothesis is supported by contemporaneous seismites in the western Tethyan realm, and micrite injections in strata below the Monotis-Dactylioceras bed, which may reflect quake-induced sediment liquefaction.

show abstract

“…According to Shiki and Yamazaki (1996), the term 'tsunamite' should be used broadly, not only for the deposits laid down by the oncoming tsunami wave itself, but also for all of the other sediments connected with the resulting backwash flow, currents, mass gravity movements etc. This leads to a "Nomenclature overlap" (Shanmugam 2006) -a situation, in which the same deposit can be properly named in different ways, as various genetic definitions refer to different moments of the sedimentary process.…”

Section: Introduction -Palaeotsunami Studiesmentioning

confidence: 99%

Stromatoporoid Beds and Flat-Pebble Conglomerates Interpreted as Tsunami Deposits in the Upper Silurian of Podolia, Ukraine

Łuczyński¹,

Skompski²,

Kozłowski³

2014

Acta Geologica Polonica

View full text Add to dashboard Cite

ABSTRACT:Łuczyński, P., Skompski, S. and Kozłowski, W. 2014. Stromatoporoid beds and flat-pebble conglomerates interpreted as tsunami deposits in the Upper Silurian of Podolia, Ukraine. Acta Geologica Polonica, 64 (3), 261-280. Warszawa.Tsunami deposits are currently a subject of intensive studies. Tsunamis must have occurred in the geological past in the same frequency as nowadays, yet their identified depositional record is surprisingly scarce. Here we describe a hitherto unrecognized example of probable palaeotsunamites.The Upper Silurian (Pridoli) carbonate succession of Podolia (southwestern Ukraine) contains variously developed event beds forming intercalations within peritidal deposits (shallow water limestones, nodular marls and dolomites). The event beds are represented by stromatoporoid and fine-grained bioclastic limestones, in some places accompanied by flat-pebble conglomerates. The interval with event beds can be traced along the Zbruch River in separate outcrops over a distance of more than 20 km along a transect oblique to the palaeoshoreline. The stromatoporoid beds have erosional bottom surfaces and are composed of overturned and often fragmented massive skeletons. The material has been transported landward from their offshore habitats and deposited in lagoonal settings. The flat-pebble conglomerates are composed of sub-angular micritic clasts that are lithologically identical to the sediments forming the underlying beds.Large-scale landward transport of the biogenic material has to be attributed to phenomena with very high energy levels, such as tropical hurricanes or tsunamis. This paper presents a tsunamigenic interpretation. Morphometric features of redeposited stromatoporoids point to a calm original growth environment at depths well below storm wave base. Tsunami waves are the most probable factor that could cause their redeposition from such a setting. The vastness of the area covered by parabiostromal stromatoporoid beds resembles the distribution of modern tsunami deposits in offshore settings. The stromatoporoid beds with unsorted stromatoporoids of various dimensions evenly distributed throughout the thickness of the beds and with clast-supported textures most probably represent deposition by traction. In some sections, the stromatoporoids are restricted to the lowermost parts of the beds, which pass upwards into bioclastic limestones. In this case, the finer material was deposited from suspension. The coexistence of stromatoporoid beds and flat-pebble conglomerates also allows presenting a tsunami interpretation of the latter. The propagating tsunami waves, led to erosion of partly lithified thin-layered mudstones, their fragmentation into flat clasts and redeposition as flat-pebble conglomerates.

show abstract

Tsunami-induced conglomerates in Miocene upper bathyal deposits, Chita Peninsula, central Japan

Cited by 88 publications

References 20 publications

Liquefaction and fluidization structures in Messinian storm deposits (Bajo Segura Basin, Betic Cordillera, southern Spain)

Liquefaction and fluidization structures in Messinian storm deposits (Bajo Segura Basin, Betic Cordillera, southern Spain)

The Monotis–Dactylioceras Bed in the Posidonienschiefer Formation (Toarcian, southern Germany): condensed section, tempestite, or tsunami-generated deposit?

Stromatoporoid Beds and Flat-Pebble Conglomerates Interpreted as Tsunami Deposits in the Upper Silurian of Podolia, Ukraine

Contact Info

Product

Resources

About