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Stunningly Colorful Sunken Forests – Sinkhole Geology. Created when subsurface layers of anhydrite and gypsum dissolve, sinkholes dot the landscape in and around Alpena with the country’s highest concentration of these geologic wonders.
view map. Michigan’s karst region is spread across Presque Isle, Alpena and Montmorency counties in the northwest corner of the Lower Peninsula and the heart of it is the Sinkhole Area, a non-motorized, 2,600-acre slice of the Mackinaw State Forest between Onaway and Atlanta.
There are 13 sinkholes located at Rockport as a result of the Karst topography of the area. One of the sinkholes is over 100 feet deep and filled with water from an underground aquifer. Search for Devonian Era fossils around the sinkholes or in the abandoned 300-acre limestone quarry located on the property.
In it are two sinkholes separated by a fragile saddle ridge, each sink is about 200 feet in diameter and 85 feet deep. Located across from the Bruski Sink on Leer Road near the intersection of Maple Lane Road, the Stevens Twin Sinks are a geological treat.
Easy • 4.1 (185) Rockport State Recreation Area. Photos (246) Directions. Print/PDF map. Share. More. Length 6.0 miElevation gain 203 ftRoute type Loop. Experience this 6.0-mile loop trail near Alpena, Michigan. Generally considered an easy route, it takes an average of 1 h 55 min to complete.
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- Alpena, Michigan, United States
Jun 13, 2024 · Uncover An Abandoned Limestone Quarry And A Sinkhole On This Easy 6-Mile Hike In Michigan. Looking for a unique hiking adventure in Michigan? Head to the Rockport Quarry and Sinkhole Loop, a fascinating 6-mile trail in Alpena that leads to an abandoned limestone quarry and a captivating sinkhole.
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Sinkhole. The Alpena Area has the highest concentration of them in the country! Check out the impressive drop-offs at Stevens Twin Sinks and Bruski Sink (both dry sinkholes), or capture the deep green pools (water-filled sinkhole) at Rockport State Recreation Area.
