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"
                                       "global chronostratigraphic units"
                                         †"Precambrian" (4600 - 541.0 Ma)
                                           (Eonothem) †Proterozoic Eonothem (2500 - 541.0 Ma)
                                             (Erathem) †Paleoproterozoic Erathem (2500 - 1600 Ma)
                                               1 (System) †Siderian System (2500 - 2300 Ma)
                                               2 (System) †Rhyacian System (2300 - 2050 Ma)
                                               3 (System) †Orosirian System (2050 - 1800 Ma)
                                               4 (System) †Statherian System (1800 - 1600 Ma)