Thickness and grain-size distribution of the 2004 Indian Ocean tsunami deposits in Periya Kalapuwa Lagoon, eastern Sri Lanka

Matsumoto, Dan; Shimamoto, Toshihiko; Hirose, Takehiro; Gunatilake, Jagath; Wickramasooriya, Ashvin; Lile, Jeffrey Roshan De; Young, Sansfica M.; Rathnayake, Chaminda; Ranasooriya, Jay; Murayama, Masafumi

doi:10.1016/j.sedgeo.2010.06.021

Cited by 41 publications

(25 citation statements)

References 24 publications

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“…It is also observed that the sedimentary structures in the ridge/swale environment are the most complex as many sedimentary structures can be observed, such as current ripple and cross bedding [26,27]. Parallel lamination is also observed in the lagoon [22], but it is only presence as a minor structure and only in one location. Similar to parallel lamination, coarsening upward or inverse grading is intensively observed in the tsunami deposits in ridge/swale environment (Table 3).…”

Section: General Characteristics Of the Sedimentologymentioning

confidence: 99%

Tsunami sediments and their grain size characteristics

Putra

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Characteristics of tsunami deposits are very complex as the deposition by tsunami is very complex processes. The grain size characteristics of tsunami deposits are simply generalized no matter the local condition in which the deposition took place. The general characteristics are fining upward and landward, poor sorting, and the grain size distribution is not unimodal. Here I review the grain size characteristics of tsunami deposit in various environments: swale, coastal marsh and lagoon/lake. Review results show that although there are similar characters in some environments and cases, but in detail the characteristics in each environment can be distinguished; therefore, the tsunami deposit in each environment has its own characteristic. The local geological and geomorphological condition of the environment may greatly affect the grain size characteristics.

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Section: General Characteristics Of the Sedimentologymentioning

confidence: 99%

Tsunami sediments and their grain size characteristics

Putra

2018

IOP Conf. Ser.: Earth Environ. Sci.

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“…Sedimentary effects of recent tsunamis have been described from various locations (e.g. Szczuciński et al 2006;Goto et al 2007Goto et al , 2009Goto et al , 2011Paris et al 2009;Matsumoto et al 2010;Yawsangratt et al 2009Yawsangratt et al , 2012.…”

Section: Introduction -Palaeotsunami Studiesmentioning

confidence: 99%

“…Fujiwara and Kamataki 2007;Kortekaas and Dawson 2007;Morton et al 2007;Bourgeois 2009;Chagué-Goff et al 2011, Goff et al 2012Phantuwongraj and Choowong 2012), the task proved to be extremely difficult. In many cases, tsunami deposits showed no distinct sedimentary features (Shanmugam 2006), or show a tendency to mimic other abrupt and high-energy marine processes (Shiki 1996;Shiki et al 2000;Matsumoto et al 2010;Goto et al 2011).…”

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

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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.

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“…In fact, such changes have been observed in many places in countries affected by the 2004 Indian Ocean tsunami (IOT). Numerous reports have described morphological changes or sediment accumulation by the tsunami at the shoreline and on land (Moore et al, 2006;Szczuciński et al, 2006;Bahlburg and Weiss, 2007;Goto et al, 2007Goto et al, , 2008aGoto et al, , 2009Hawkes et al, 2007;Hori et al, 2007;Umitsu et al, 2007;Choowong et al, 2008;Fujino et al, 2008;Matsumoto et al, 2008Matsumoto et al, , 2010Morton et al, 2008;Paris et al, 2009). To date, post-2004 IOT monitoring in offshore and beach zones has rarely been reported in the literature.…”

Section: Introductionmentioning

confidence: 99%