The structure of the Baltic Sheet attracts the great interest of geologists over the world. In 1979, within the framework of the EUROBRIDGE project, the long-range deep seismic sounding experiment FENNOLORA was carried out by international group of scientists. The length of this geotraverse is about 2000 km. New seismic cross section along this line now is obtained with depth more 170 km. The cross section has been computed automatically using the program GODOGRAF, based on method of homogeneous functions. As a result of interpretation of the cross section the lithospheric and mantle structures below the Fennoscandian Shield have been obtained. It is showed the large lithosphere slab by thick of 25-45 km exists in asthenosphere. Also the comparison between the new cross section and former cross section, derived by Guggisberg, has been showed.


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