Geohistorics

Geohistorics refers to the specialization within geology that concerns past geologic states of planets and the methods by which geology was studied in the past.

Tetro's Geologic History
Tetro was formed approximately 5.2 billion Earth-years ago from coalescing dust and gas following the cloud-collapse that created Stella Fortuna. By 4.8 billion Earth-years ago, Tetro's surface had cooled and its clouds, composed of hydrogen and oxygen, rained down water on the surface, forming the planet's oceans. Very little has changed geologically on Tetro since this time. It retains a molten core, but its crust is too thick for tectonic plates or volcanoes to form.