The Marlboro Mountains are a series of hills that extend from Newburgh to Kingston. Like the Catskills, the Marlboros are composed of ancient sedimentary rock but they much, much older.
The Marlboros were formed during the Ordovician period which began almost half a billion years ago.
The Ordovician period was marked by the emergence of the first jawed fish, and the first land organisms in the form of simple plants.
The Devonian period (during which The Catskills formed) followed the Silurian — so, oldest to newest, the geological eras are ordered Cambrian › Ordovician › Silurian › Devonian.
Easiest Marlboro Peaks (1)
A delightfully mellow mountain in a Scenic Hudson public preserve.
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