Volo Bog Nature Preserve - U.S. National Natural Landmarks on Waymarking.com

From the Illinois Department of Natural Resources web site:
Forty-five miles northwest of Chicago in Lake County, Volo Bog is the only “quaking” bog in Illinois. The bog is a registered National Natural Landmark and a dedicated nature preserve. Picnicking, hiking, and cross country skiing are offered at the site. There is an abundance of unique plants and wildlife that can be seen in Volo Bog.

Volo Bog State Natural Area is home to Illinois' only remaining open-water quaking bog. A gift of the Wisconsin Glacier, Volo Bog began forming in a kettle hole lake over 6,000 years ago. A floating mat of vegetation encroached from the lake edges toward the center. The initial plant community included sphagnum mosses and sedges. As these plants died, they did not decompose but formed a floating substrate of peat from which more plants grew. As the mat thickened, it supported larger plants such as cranberry, leatherleaf and poison sumac. Deciduous tamarack pines gained a foothold as the mat thickened to support their increasing weight. Highbush blueberry, the carnivorous pitcher plant and several orchids also make their home in Volo Bog. Today, five plant communities encircle a half-acre pond like a target. The pond has no true bottom; suspended peat thickens toward the bottom of the old kettle hole 50+ feet below. A 1/2 mile trail including a wooden boardwalk loops through all the stages of bog succession to overlook the center pond.

Volo Bog was designated an Illinois Nature Preserve in 1970 and a National Natural Landmark in 1973. It is an excellent outdoor laboratory and classroom. Interpretive programs are available to most ages (beginning at 4 years old) throughout the year.

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