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Diatom assemblages in 26 December 2004 tsunami deposits from coastal zone of Thailand as sediment provenance indicators

100%

Kokocinski M., Szczucinski W., Zgrundo A., Ibragimow A.

Polish Journal of Environmental Studies

2009

tom 18

nr 1

93-101

Tsunami deposits are often characterized by specific diatom assemblages, which may indicate sediment provenance and help identify paleotsunami deposits. In the present study diatom assemblages were studied in tsunami deposits left by the 2004 tsunami in Thailand, as well as in beach sediments, inner shelf marine sediments and freshwater ponds and streams. The assemblages in tsunami deposits had chaotic structure and consisted of species found in all the studied habitats, suggesting erosion of terrestrial and marine sediments by tsunami. The diatom frustules in tsunami deposits were generally rare and often damaged due to excessive wave force. The most common identified species were Amphora turgida Gregory, Cocconeis scutellum Ehrenberg, Diplomenora cocconeiformis (Schmidt) Blazé, Eunotogramma marinum (W. Smith) Peragallo (typical for benthos of marine and brackish environments), and taxa common in freshwaters, including Cyclotella ocellata Pantocsek, Cocconeis placentula Ehrenberg and Encyonema silesiacum (Bleish) D.G. Mann.

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Holocene evolution of the Pomeranian Bay environment, Southern Baltic Sea

100%

Kostecki R., Janczak-Kostecka B.

Oceanologia

2011

tom 53

nr (1-TI)

This article focuses on the diatom assemblages and geochemical composition of sediment cores retrieved from the Pomeranian Bay. We also discuss similarities and differences in the diatom assemblages and the palaeogeographic development of nearby regions. Our main objective was to determine the characteristics and rate of the Littorina transgression in the Pomeranian Bay area. Sediments were divided into units based on differences in the distribution of diatom ecological groups and in geochemical ratios, such as Mg/Ca, Na/K and Fe/Mn. This study identified lacustrine sediments deposited during the time of the Ancylus Lake. This lacustrine-period sedimentation took place in a shallow lake under aerobic conditions. The record of the onset of marine environment dates to 8900–8300 cal BP and corresponds to the Littorina transgression. After about 8300 cal BP, sedimentation took place in a deeper marine environment with higher biogenic production and anaerobic conditions. The abrupt appearance of marine diatom species and increased geochemical salinity indicators reflect the large impact of the Littorina transgression on the Pomeranian Bay environment.

Half a century of research on diatoms in athalassic habitats in Central Poland

100%

Zelazna-Wieczorek J., Olszynski R. M., Nowicka-Krawczyk P.

Oceanological and Hydrobiological Studies

2015

tom 44

nr 1

Ograniczanie wyników

1 Oceanologia

1 Oceanological and Hydrobiological Studies

1 Polish Journal of Environmental Studies

1 Ibragimow A.

1 Janczak-Kostecka B.

1 Kokocinski M.

1 Kostecki R.

1 Nowicka-Krawczyk P.

1 Olszynski R. M.

1 Szczucinski W.

1 Zelazna-Wieczorek J.

1 Zgrundo A.

1 2015

1 2011

1 2009

Wyniki wyszukiwania

Diatom assemblages in 26 December 2004 tsunami deposits from coastal zone of Thailand as sediment provenance indicators

Holocene evolution of the Pomeranian Bay environment, Southern Baltic Sea

Half a century of research on diatoms in athalassic habitats in Central Poland