Serpentine Region

The grassland and barren habitats that straddle the border of southern Lancaster and Chester Counties are some of the most globally important habitats in Pennsylvania.  Serpentine barrens are the result of a unique geology, and are only found in a few places in the world. Exposed serpentine bedrock harbors a suite of plants and insects that are uncommon for the state, and several of these species are endemic to these habitats and occur nowhere else in the world.

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