Trekipedia

Planet, Class-L

Marginal. Age ranged from 4-10 billion years. Diameter was 10,000 to 15,000 km. Typically located in the Ecosphere of a planetary system. Surface was rocky and barren, with little surface water; atmosphere was oxygen/argon, with a high concentration of carbon dioxide. Suitable for humanoid colonization. Typically had limited plant life.^[1]