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The Kaali crater field and other geosites of Saaremaa Island (Estonia): the perspectives for a geopark

Raukas Anto, Stankowski Wojciech

Geologos

2010

Vol. 16, No. 1

59--68

The Island of Saaremaa in Estonia offers highly spectacular geological features that belong to the most interesting in the Baltic Sea area. A unique geological monument on the island is the Kaali meteorite-crater field, formed by nine meteorite impacts. There are also attractive coastal cliffs, huge erratics, alvars (limestone areas covered by a very thin soil) and well-developed glacial and marine landforms. Limestone cliffs and shingle beaches abound with Silurian fossils and offer great opportunities to fossil collectors. The island is a prospective geopark. During the past few years, the geology of the island has become an intensely studied object of Estonian and Polish geologists.

Litorina Sea shore displacement on the Island of Saaremaa, Estonia

Saarse L., Vassiliev J., Rosentau A.

Polish Geological Institute Special Papers

2009

Vol. 25

59-66

Sedimentological and magnetic susceptibility analyses, and radiocarbon datings of six Holocene sequences (Ohtja, Kihelkonna, Vedruka, Vesiku, Lümanda, Jáempa) were used to elucidate the Litorina Sea development on the Island of Saaremaa, Estonia. The Litorina Sea beach formations are located between 20.5 and 15.5 m above the present day sea level. Spatial distribution of the Litorina Sea shore displacement was reconstructed. The onset of the Litorina Sea transgression in the study area is dated to 8200 cal yr BP. The measure of a single transgression was about 4.5–5.0 m.

Badania sedymentologiczne i analiza podatności magnetycznej oraz datowania radiowęglowe w 6 stanowiskach holoceńskich (Ohtja, Kihelkonna, Vedruka, Vesiku, Lümanda, Jáempa) umożliwiły przedstawienie rozwoju morza litorynowego na wyspie Saaremaa w Estonii. Formacje plażowe morza litorynowego występują na wysokości od 20,5 do 15,5 m n.p.m. Zrekonstruowano położenie brzegu morza litorynowego. Początek transgresji morza litorynowego określono na 8200 lat kalendarzowych. Wielkość pojedynczej transgresji wynosiła około 4,5–5,0 m.