Geology of Tolstoj quadrangle (H08), Mercury

Tolstoj quadrangle (H08) is located in the equatorial area of Mercury, between 22.5°N and 22.5°S and 144° and 216°E. Using the NASA/MESSENGER data, we compiled a geological map of the quadrangle at a scale of 1:3.000.000. The main basemap we used was the MDIS 166 m/pixel BDR mosaic. In addition, mosaics with high-incidence illumination from west and east, MDIS global color mosaics, and the MDIS global DEM have been taken into account. In the map, we considered three feature classes: geological units, lineaments, and surface features. Geological units consist of crater material and plains. Lineaments include crater and pit rims, and structures. Finally, surface features are subdivided into crater chains or clusters, hollows, faculae, bright and dark material. The geological map will be integrated into the global 1:3M geological map of Mercury, which is being prepared in support to the ESA/JAXA BepiColombo mission.