Geological Formation: Fountain Lake (volcanic) and Cumberland (sedimentary) groups
Age: Devonian and Carboniferous (circa 350-300 million years)
Directions: From Apple River, head south to Apple River Road through West Apple River. (Note that at extreme high tides the small bridge at Edgett Beach may be submerged.) Cross the bridge at Spicer Cove, and park on the left. Hike south towards the cliffs.