Class G
Classification
Class G - Geocrystalline
Age
3-4 billion years
Diameter
10,000 - 15,000 km
Location
Ecosphere
Surface
Still crystallizing
Atmosphere
Carbon dioxide, some toxic gases
Evolution
Cools to become Class K - Adaptable, Class L - Marginal, Class M - Terrestrial, Class N - Reducing, Class O - Pelagic or Class P - Glaciated
Life-forms
Promitive single-celled organisms