Near Fish Creek in Door County, Wisconsin — The American Midwest (Great Lakes)
Life on the Ledge
The Niagara Escarpment
At Peninsula, rocky bluffs ascend over 150 feet. They are part of the Niagara Escarpment, a 650-mile geologic formation. This fossil-rich sedimentary rock began to form 420 million years ago at the outer rim of a shallow sea. Today the escarpment is the "backbone" of Peninsula State Park. This varied terrain provides critical habitat for 500-year-old cedar trees, delicate ferns, and rare land snails.
Peninsula also harbors eight miles of shoreline. Wave-splashed and ice-pushed, it is ever changing. Walk the coast to see windrows of rounded cobbles. Watch for boulders strewn near the water's edge. Brachiopod and coral fossils, evidence of ancient Silurian Sea, may be embedded in the rock.
Look along the rocky shore for brachiopod fossils. These two-shelled ocean animals lived here millions of years ago.
Cedar trees are cliff survivors. They sink their roots into rock cervices that catch bits of soil and moisture, then are helped along by rock-bound algae and fungi. At least a few of Peninsula's ledge-loving cedars are over 500 years old.
Location. 45° 9.757′ N, 87° 11.893′ W. Marker Touch for map. Marker is in the Eagle Tower and Sentinel Trail parking area in Peninsula State Park. Fee area; a vehicle admission sticker is required. Marker is at or near this postal address: 9462 Shore Road, Fish Creek WI 54212, United States of America.
Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies. A State Park System is Formed (approx. 0.2 miles away); A Road Less Traveled (approx. ¼ mile away); Anderson Dock (approx. 1.3 miles away); Island Paradise (approx. 1.4 miles away); First Permanent Colony in Door County (approx. 1.4 miles away); Eagle Bluff Lighthouse (approx. 1.9 miles away); Why Green Bay? (approx. 2.2 miles away); Privilege in the Park (approx. 2½ miles away). Touch for a list and map of all markers in Fish Creek.
More about this marker. captions:
• Brachiopod Fossil
• Eagle Cave
• Generalized Location of Niagara Escarpment in North America
• Eagle Bluff in winter
Also see . . .
1. Peninsula State Park. Nature and wildlife. "The limestone cliffs form a rock ridge called the Niagara Escarpment. This ridge of bedrock stretches across the state of Wisconsin, forming the Door Peninsula, the cliffs at (Submitted on November 29, 2014.)
2. The Niagara Escarpment: Wisconsin's eighth natural wonder. (Submitted on November 29, 2014.)
3. The Niagara Escarpment. (Submitted on November 29, 2014.)
4. Niagara Escarpment Resource Network. (Submitted on November 29, 2014.)
5. Wisconsin Natural Resources magazine. (Submitted on November 29, 2014.)
6. Door County and the Niagara Escarpment. (Submitted on November 29, 2014.)
7. Niagara Escarpment. Wikipedia entry. (Submitted on November 29, 2014.)
Categories. • Natural Features •
Credits. This page was last revised on June 16, 2016. This page originally submitted on November 29, 2014, by Keith L of Wisconsin Rapids, Wisconsin. This page has been viewed 232 times since then and 14 times this year. Photos: 1, 2, 3, 4, 5, 6, 7, 8, 9. submitted on November 29, 2014, by Keith L of Wisconsin Rapids, Wisconsin.