Bogs are somewhat common, appearing in most systems. They are extremely rich in algae (which is fantastic for bio-fuel) and several types of plants found nowhere else. Their soil is moist and easy to mine, making for a rich location for a newcomer to gather resources.
Codex description Edit
Rich in algae, muck, and plant life. They are ripe with rainy weather, and thick bogs. Travel can be difficult, but the surplus algae will be useful.