====== MesoArean ======
{{ :worldgen:pcl:mesoarean.png?200&nolink|Barren Meso Arean world}}
{{ :worldgen:pcl:mesoarean-simple.png?200&nolink|Meso Arean world with simple life}}

**Group**: [[Dwarf Terrestrial Group]] \\
**Class**: [[Dwarf Terrestrial Group#GeoCyclic Class]] \\
**Type**: [[Arean]] (Subtype) \\
**Related**: [[EoArean]], [[EuArean]], [[AreanLacustric]]

Within a billion years, [[EoArean]] worlds rapidly cool and settle into a //MesoArean// stage. The atmosphere may still be reasonably thick, but won't stay that way for long. As the atmosphere thins, so any surface water will evaporate and oceans will begin to dry up.

Sometimes complex life will form, but rarely develops beyond the oceans or basic lichens and mosses on the land.

This stage can last as little as a hundred million years. If the world manages to maintain geological processes that keep the atmosphere topped up, then it becomes an [[AreanLacustric]]. If it is too close to its star, then it may become an [[AreanXenic]]. Normally however, the atmosphere thins, the seas evaporate and it becomes a cool [[Arean]] desert world.

===== Geology =====

Similar to [[EuArean]], with the addition of surface water and a thicker atmosphere.

==== Supported Features ====

  * EquatorialRidge - east/west mountains along the equator.
  * PolarRidge - north/south mountains.
  * GiantCrater - huge crater near the equator.
  * HeavilyCratered - many more craters than normal.
  * SingleSea - single sea in one hemisphere.
  * EquatorialSea - all water near the equator
  * Smooth - no mountains, few craters.