65e70736-e9e4-46d7-815f-5e530a010855 eng utf8 dataset Geological Survey of Finland (GTK) +358295032105 ESPOO 02151 Finland gtk@gtk.fi pointOfContact 2024-03-13 ISO 19115/INSPIRE_TG2/CZ4 2003/cor.1/2006 WGS84 (4326) Borehole Index Finland 2021-03-15 creation mapDigital The map compiles seabed samples since 1985 onwards. The data includes geographic data and metadata related to each sample, mainly based on the data produced by the Geological Survey of Finland Geological Survey of Finland (GTK) +358295032105 ESPOO 02151 Finland gtk@gtk.fi pointOfContact European Spatial scope 2019-05-22 publication marine geology sea bed sediment marine sediment Holocene Precambrian GeoERA Keyword Thesaurus 2020-01-01 publication EMODnet-Geology European Geoscience Registry - Projects 2020-01-01 publication otherRestrictions Creative Commons BY 4.0 otherRestrictions no limitations to public access vector eng geoscientificInformation 17.866 29.046 58.161 65.839 ESRI Geodatabase DIRECTIVE 2007/2/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 14 March 2007 establishing an Infrastructure for Spatial Information in the European Community (INSPIRE) 2007-03-14 See referenced specification Possible sampling sites will be selected based on the acoustic-seismic profile. Depending on the research purpose, samples are taken either with long sediment corer (e.g. vibrohammer cores, piston corer, gravity corer) or surface sediment corer (e.g. Gemax corer, Box corer, Van Veen Grab sampler, Oscorer). The piston corer -type sampler is used for taking the long sediment cores from soft substrates. For taking of the long sediment cores from hard substrates (such as till, sand or gravel), vibro hammer corer is used. Gemax corer (maximum sample length 0.5 m down from the seabed surface) is used for taking sediment cores from soft sediment bottom. It is used mainly for environmental studies, e.g. investigating the short-term changes in the nutrient and heavy metal loading. The principle of sampling is to recover undisturbed sediment sample from the seabed. Onboard research vessel the sediment core/sample material is described and photographed. The geological interpretation with possible drawings are added to the observation forms/sheets. In general, the subsamples are stored for laboratory examinations. The results of grain size analyses and geochemical analyses are stored in the Labtium laboratory database and in the GTK database.