Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "spheres" (Earth)
                                 (Sphere) Lithosphere (Earth) - layer of rock
                                   "strata"
                                     "chronostratigraphic units"
                                       "regional chronostratigraphic units" (Siberia)
                                         01 (Stage) †Vendian Stage
                                         02 (Stage) †Nemakit-Daldynian Stage
                                         03 (Stage) †Tommotian Stage
                                         04 (Stage) †Atdabanian Stage
                                         05 (Stage) †Botoman Stage
                                         06 (Stage) †Toyonian Stage
                                         07 (Stage) †Amgan Stage
                                         08 (Stage) †Mayan Stage
                                         09 (Stage) †Kulyumbean Stage
                                         10 (Stage) †Gorbiyachinian Stage
                                         11 (Stage) †Tukalandian Stage
                                         12 (Stage) †Khantaian Stage