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

Grudzinska, Ieva; Saarse, Leili; Vassiljev, Jüri; Heinsalu, Atko

doi:10.17741/bgsf/85.1.002

Cited by 15 publications

(18 citation statements)

References 27 publications

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“…The cal cu lated sum mary land up lift dur ing the last 10,300 years was 4.4 mm yr -1 at Káivasoo, and has de creased to 2.5 mm yr -1 at pres ent (Torim, 2004). These re sults com ple ment ob ser va tions of re cent in vesti ga tions by Veski et al (2005), Saarse et al (2010), Grudzinska et al (2013) and Rosentau et al (2013).…”

Section: Discussion Litho- Bio-and Chronostratigraphysupporting

confidence: 77%

“…How ever, un like at Loopsoo and Prassi, the tran si tion zone from a la goon to a fresh wa ter ba sin in Tihu is marked by a peak of small-sized fragilarioid taxa (Fig. 3C), in dicat ing a change in depositional en vi ron ment (Seppä and Tikkanen, 1998;Seppä et al, 2000;Risberg et al, 2005;Grudzinska et al, 2012Grudzinska et al, , 2013. Sand re place ment by coarse de tri tus gyttja marks the iso la tion con tact at 191 cm and is in ac cor dance with a change in di a tom as sem blage from ma rine/brack ish-wa ter taxa to fresh wa ter taxa (Fig.…”

Section: Discussion Litho- Bio-and Chronostratigraphymentioning

confidence: 99%

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Relative sea-level changes and development of the Hiiumaa Island, Estonia, during the Holocene

Vassiljev

Saarse

Grudzinska

et al. 2015

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1 Tallinn Uni ver sity of Tech nol ogy, In sti tute of Ge ol ogy, Ehitajate tee 5, 19086 Tallinn, Es to nia Vassiljev, J., Saarse, L., Grudzinska, I., Heinsalu, A., 2015. Rel a tive sea level changes and de vel op ment of the Hiiumaa Island, Es to nia, dur ing the Ho lo cene. Geo log i cal Quar terly, 59 (3): 517-530, doi: 10.7306/gq.1227Three sed i ment cores (Loopsoo, Tihu, Prassi) from Hiiumaa Is land (Es to nia) were in ves ti gated us ing di a toms, lithological prox ies, mag netic sus cep ti bil ity, geo chron ol ogi cal dates and in cor po rated with the pre vi ously stud ied Káivasoo site, aim ing to re con struct the de vel op ment of the is land and shore line changes dur ing the Litorina Sea and the Limnea Sea. The high est level of the Litorina Sea shore line near Káivasoo is at 27.6 m a.s.l., and it oc curred dur ing the Ini tial Litorina Sea. Within the Litorina Sea trans gres sion, 7800 cal yr BP, rel a tive sea level reached 24.9 m a.s.l. at Káivasoo, 24.1 m a.s.l. at Loopsoo, 23.6 m a.s.l. at Tihu, and 21.5 m a.s.l. at Prassi. Káivasoo be came iso lated from the sea about 8500 cal yr BP, Loopsoo between 7100 and 6800 cal yr BP, Tihu around 4800 cal yr BP, and Prassi about 2500 cal yr BP. Pres ently gained data from Hiiumaa Is land con firm that the Litorina Sea re gressed con sis tently dur ing the last 8000 years due to pro gres sively de clin ing iso static re bound. The pres ent study is also il lus trated by 3-di men sional palaeogeographic maps of the Hiiumaa Is land devel op ment.

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Section: Discussion Litho- Bio-and Chronostratigraphysupporting

confidence: 77%

Section: Discussion Litho- Bio-and Chronostratigraphymentioning

confidence: 99%

Relative sea-level changes and development of the Hiiumaa Island, Estonia, during the Holocene

Vassiljev

Saarse

Grudzinska

et al. 2015

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“…These sites are often situated around former estuaries and river mouths (Veski et al 2005;Jussila et al 2007;Rosentau et al 2013) or lagoonal systems (Kriiska 1999;Miotk-Szpiganowicz et al 2010;Loze 2011;Rosentau et al 2013). Houmark-Nielsen & Kjaer 2003;Saarse & Vassiljev 2010;Grudzinska et al 2013) and Stone Age human habitation patterns (e.g. Palaeogeographical reconstructions, especially when considering the changes in sea level and land uplift, can be useful not only for understanding the palaeoenvironment (e.g.…”

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confidence: 99%

GIS‐based multiproxy coastline reconstruction of the eastern Gulf of Riga, Baltic Sea, during the Stone Age

Habicht

Rosentau

Jõeleht

et al. 2016

Boreas

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We present early to mid-Holocene palaeocoastline reconstructions for the Tolkuse-Rannametsa area on the eastern coast of the Gulf of Riga. Radiocarbon-dated sediment stratigraphies and diatom analyses, supported by ground-penetrating radar data and GIS-based modelling, were used in the palaeogeographical reconstructions to strip back younger sediments and landforms from the LiDAR-derived digital elevation model. The reconstructions show an open coast environment during the Ancylus Lake stage and the formation of a peatland after the lake drainage at about 9000-8600 cal. a BP. The waters of the Litorina Sea flooded the study area between 8200 and 7700 cal. a BP, forming a 25-km-long and up to 5.5-m-deep lagoon with two connections to the sea. This brackish water lagoon existed in the area for about 4000 years and terminated around 3800-3500 cal. a BP as a result of isostatic uplift and growth of the barrier spit. The reconstructions illustrate the relationships between the lagoonal system and three Mesolithic and Neolithic settlement sites found in the study area. A comparative analysis which besides palaeogeographical and ecological data included a data set with more than 100 Stone Age sites from the eastern Baltic region, was used to propose the most suitable locations for coastal settlements in the Tolkuse-Rannametsa area. However, some of these areas are presently covered by a peat layer that is several metres thick, which may explain the relative scarcity of the archaeological finds on the shores of the palaeo-lagoon. The proposed multiproxy approach has the capability to delimit the areas that would have been favourable for prehistoric habitation, but might not be observable in the present-day topography. In return, this increases the likelihood of locating any well-preserved preserved settlement sites and artefacts that are buried under the protective sediment layer.Hando-Laur Habicht (hando-laur.habicht@ut.ee)and Raivo Aunap, studies and was incorporated into the current study for detailed palaeogeographical reconstruction of a palaeo-lagoon system in the coastal zone of the Gulf of Riga, the Baltic Sea.

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“…Since 7 ka BP, the relative sea level lowering curves have been relatively stable (linear) around the coasts of the Baltic Sea (Grudzinska et al . ), while their steepnesses reflect predominantly the local isostatic uplift rates. For the present day, a few Fennoscandian apparent uplift maps (e.g.…”

Section: Study Area and Geological Backgroundmentioning

confidence: 99%

Cyclicity in ridge patterns on the prograding coasts of Estonia

Suursaar

Kall

Steffen

et al. 2019

Boreas

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Recent LiDAR surveys have revealed that on postglacially uplifting coasts of Estonia rhythmic coastal landforms (beach ridge sequences and foredune plains) occur to a considerable extent. We studied four of them to reveal age and periodicity in these multiple ridge systems and discussed their genesis in the Subatlantic (semi‐continental) conditions of the Baltic Sea area. Using recent models of Fennoscandian uplift due to glacial isostatic adjustment (GIA), we constructed Holocene apparent sea level curves for the study sites at Õngu, Mänspe, Haldi and Keibu; converted distance–height shore profiles into time series (including corrections on shore profile non‐linearity and variations in GIA‐eustasy balance); and analysed the patterns using spectral analysis. It was suggested that due to non‐tidal conditions, relatively low‐energy hydrodynamic forcing and small aeolian contribution, the ridges mark ancient shorelines. They are relatively modest in height (mostly 0.2–1 m), form regular and extensive (up to 150 ridges) patterns, and date back to ~9000 years before present. We studied <5‐ka‐old sections. The mean ridge spacing varied, depending also on coastal slope, between 21 and 39 m. Both simple counting and spectral analysis involved some specific limitations, yet the estimates for typical spacing were alike, at 32 (±5) years. The regular nature of the low‐ridge patterns originated from relative sea level lowering and gradual sediment accretion/erosion. However, the progradation was rather uplift‐ than accretion‐driven and the stepwise process in ridge formation was probably not autocyclic. It was governed or modulated by quasi‐periodic 25–40 year cyclicity in local wave forcing, relative sea level variations and wind conditions. Being most likely connected to the North Atlantic Oscillation, the quasi‐regular, decadal‐scale, similarly phased variations may magnify each other's effect on the westerly exposed coasts of Estonia. Additionally, some other (e.g. event‐driven) mechanisms may also be present.

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

Cited by 15 publications

References 27 publications

Relative sea-level changes and development of the Hiiumaa Island, Estonia, during the Holocene

Relative sea-level changes and development of the Hiiumaa Island, Estonia, during the Holocene

GIS‐based multiproxy coastline reconstruction of the eastern Gulf of Riga, Baltic Sea, during the Stone Age

Cyclicity in ridge patterns on the prograding coasts of Estonia

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