“…The first compilations of regional crustal databases for Siberia go back to the 1970s and 1980s and are available as maps showing the thickness of sediments and the Moho depth (Bazanov et al, 1976;Belyaevsky, 1973;Kontorovich et al, 1975;Kovylin, 1985;Kunin and Ioganson, 1984;Rudkevich, 1974;Savinsky, 1972). These crustal maps are based not only on the available seismic data but also include borehole data for the sedimentary cover and potential field constraints for areas which were not covered by seismic surveys.…”