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Central Adirondacks

Ecoregion in Adirondack Park, Adirondack Mountains in NY

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Geology creates the differences between the Central Adirondacks and the adjacent Acid Sensitive Adirondacks (58aa). The bedrock underlying the Central Adirondacks is composed mostly of anorthosite and interbedded metasedimentary rock, both of which have a moderate to high acid neutralizing capacity. As a result, unlike in Ecoregion 58aa, most of the lakes and streams in the central Adirondacks are not at high risk for acidification. The Central Adirondacks ecoregion includes the headwaters of the Hudson River where white pine and spruce were once abundant. Because they were favored for logging, these two species have been largely replaced by successional hardwoods. A concentration of large lakes, including the Saranac Lakes, occurs in the northern part; they are perched at the edge of the elevated dome of the Adirondack Mountains above the network of outwash channels that define the northern foothills of the Adirondacks in Ecoregion 58ab.

— EPA

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