Plant Life on Rock Outcropping, Minister Valley, Allegheny National Forest, Pennsylvania

Moss, ferns, and trees grow from a large rock outcropping near the Minister Valley in Allegheny National Forest in Warren, Pennsylvania. The Allegheny Front was once part of a vast delta and layers of a hard, sandstone congolomerate were deposited. Between 250 and 320 million years ago, the Allegheny Front was lifted, forming hills and mountains. Over time, erosion exposed, split, or dislodged and moved the former sedimentary rock, resulting in large rock outcroppings.

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Moss, ferns, and trees grow from a large rock outcropping near the Minister Valley in Allegheny National Forest in Warren, Pennsylvania. The Allegheny Front was once part of a vast delta and layers of a hard, sandstone congolomerate were deposited. Between 250 and 320 million years ago, the Allegheny Front was lifted, forming hills and mountains. Over time, erosion exposed, split, or dislodged and moved the former sedimentary rock, resulting in large rock outcroppings.