Palaeogeographic Model for the SW Estonian Coastal Zone of the Baltic Sea

Rosentau, Alar; Veski, Siim; Крийска, Айвар; Aunap, Raivo; Vassiljev, Jüri; Saarse, Leili; Hang, Tiit; Heinsalu, Atko; Oja, Tõnis

doi:10.1007/978-3-642-17220-5_8

Cited by 26 publications

(53 citation statements)

References 26 publications

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“…Our relative sea-level curve shows regular decrease (Fig. 5) and is in agreement with the curves recently reconstructed around the Gulf of Finland and for the northern part of the Baltic Sea (Seppä et al 2000;Miettinen 2002Miettinen , 2004Lindén et al 2006;Rosentau et al 2011;Saarnisto 2012), still differing from the reconstruction carried out in the southern part of the Baltic Sea (e.g. Gelumbauskaitė 2009).…”

Section: Discussionsupporting

confidence: 85%

A palaeocoastline reconstruction for the Käsmu and Pärispea peninsulas (northern Estonia) over the last 4000 years

Grudzinska¹,

Saarse²,

Vassiljev³

et al. 2012

Estonian J. Earth Sci.

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The marine-freshwater environmental transition, i.e. basin isolation from the Limnea Sea, has been identified in two short sediment cores with respect to their diatom composition, loss-on-ignition and magnetic susceptibility content. The isolation level of the basins was dated by accelerator mass spectrometry radiocarbon measurements. The basins are situated on the southern coast of the Gulf of Finland between altitudes 5.5 and 3.9 m above sea level. The Lohja basin became isolated from the sea around 2300 cal yr BP and Käsmu basin around 1800 cal yr BP as a result of glacio-isostatic uplift. The total land upheaval rate that has been 2.6 mm yr –1 since 2500 cal yr BP has currently decreased to 2.0 mm yr –1. We present a GIS-based 3D palaeogeographic reconstruction of the palaeocoastline changes in northern Estonia for two peninsulas, Pärispea and Käsmu, as well as compose a shoreline displacement curve for the study area, which is a compilation of previous and ongoing investigations

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Section: Discussionsupporting

confidence: 85%

A palaeocoastline reconstruction for the Käsmu and Pärispea peninsulas (northern Estonia) over the last 4000 years

Grudzinska¹,

Saarse²,

Vassiljev³

et al. 2012

Estonian J. Earth Sci.

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“…The ages obtained for Ruhnun Island indicate systematic progradation of the beach with average rate of c. 0.38 m per year being in good agreement with data from relative sea level studies by Saarse et al (2009) and Rosentau et al (2011). A similar shore-parallel Litorina Sea foredune sequence has been OSL dated using quartz in NE Estonia (Rosentau et al, 2013).…”

Section: Chronology Of Foredune Accumulation On Ruhnu Islandsupporting

confidence: 86%

“…Radiocarbon ages from the Pärnu Bay area (Rosentau et al, 2011) and Saaremaa Island (Saarse et al, 2009) show that the highest shoreline of the Litorina Sea formed around 7.3 cal ka BP. Its maximum elevation, which varies due to the differential isostatic uplift in the area, has been estimated to about 9-10 m a.s.l.…”

Section: Chronology Of Foredune Accumulation On Ruhnu Islandmentioning

confidence: 99%

Comparing different post-IR IRSL approaches for the dating of Holocene coastal foredunes from Ruhnu Island, Estonia

2014

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From the bleaching experiments it is inferred that the higher values observed for post-IR IRSL at more elevated stimulation temperatures (225°C/290°C) are likely related to either thermal transfer and/or slow-to-bleach components within the signal. For the dating of the Holocene foredune sequence of Ruhnu Island, the post-IR IRSL (150°C) approach is preferred and these agree with the limited independent age control available from radiocarbon dating. Accordingly, the sequence formed between ca. 7.0 ka and 2.5 ka ago.

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“…Therefore a series of emerged coastal lakes, situated at various elevations between the Litorina Sea transgression limit and the present sea level, were investigated. We also aimed at reconstructing the local palaeogeography, compiling a relative sea level curve and testing the existing agedepth models (Saarse et al, 2007;Rosentau et al, 2011), which claims that the sea level has regressed rather evenly over the last 5000 years due to a linear land uplift (Mörner, 1979;Lindén et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Mid- and late-Holocene shoreline changes along the southern coast of the Gulf of Finland

Grudzinska¹,

Saarse²,

Vassiljev³

et al. 2013

Bull Geol Soc Finland

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In response to glacio-isostatic rebound in Estonia, a relative sea level fall occurred during the mid-and late-Holocene, and as a result, lowland regions in northern Estonia have experienced an evolution from sea to land. The mid-and late-Holocene shoreline changes along the southern coast of the Gulf of Finland were reconstructed, using litho-, bio-and chronostratigraphical proxies from four lakes. The lakes are located within the Gulf of Finland drainage system at different altitudes between 18 and 4 m above the present sea level. The isolation from the sea and the onset of freshwater lacustrine sedimentation occurred in Tänavjärv basin at 5400 cal yr BP, in Klooga basin at 4200 cal yr BP, in Lohja basin at 2200 cal yr BP and in Käsmu basin at 1800 cal yr BP. Through the application of GIS-based analysis, a modern digital terrain model and reconstructed past water level surfaces, we present a series of scenarios of shoreline and palaeogeography changes occurring since 7800 cal yr BP. The land uplift rate, which was approximately 2.8 mm yr -1 7800 cal yr BP in the surroundings of Tänavjärv, has decreased to 2.2 mm yr -1 at present and that at Lohja from 2.4 to ca 2.0 mm yr -1 , respectively. The relative sea level curves show a land uplift decrease, which is nearly linear since the mid-Holocene.

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Palaeogeographic Model for the SW Estonian Coastal Zone of the Baltic Sea

Cited by 26 publications

References 26 publications

A palaeocoastline reconstruction for the Käsmu and Pärispea peninsulas (northern Estonia) over the last 4000 years

A palaeocoastline reconstruction for the Käsmu and Pärispea peninsulas (northern Estonia) over the last 4000 years

Comparing different post-IR IRSL approaches for the dating of Holocene coastal foredunes from Ruhnu Island, Estonia

Mid- and late-Holocene shoreline changes along the southern coast of the Gulf of Finland

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