The chapter provides results of the generalization and interpretation of deep geophysical studies. The model of the deep crustal structure is represented by a set of maps, showing the crustal thickness, and a 5400 km-long Geotransect, crossing major tectonic areas of northeastern Eurasia. A set of digital maps covering an area of 50,000,000 km² is compiled in a single projection and includes the following maps: the Moho depth; the thickness of main crustal units (sedimentary cover and consolidated crust); the anomalous gravity field and anomalous magnetic field used for zoning of the area; crustal types. The Geotransect crosses North-Eastern Eurasia and characterizes the vertical section of the earth’s crust and upper mantle in the passive margin of the Eurasian continent (including submarine elevations of the Arctic Ocean and its shelf part), the active eastern continental margin and extends into the Pacific Plate.