Nature
The Feltville Formation is an early Jurassic bedrock unit found mainly in New Jersey, with outliers in Pennsylvania and New York, named for Feltville in the Watchung Reservation near the type section identified by Paul E. Olsen. Dating to about 199 to 196 million years ago, it lies between the Orange Mountain and Preakness basalts and consists of sandstone, siltstone, mudstone, and limestone layers. Its rocks preserve evidence of shifting Newark Basin environments during the breakup of Pangea, from arid playas and alluvial fans to deeper lakes in wetter intervals, and contain fish, plant remains, pollen, roots, and reptile and dinosaur tracks.
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New Jersey · United States