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The most prominent feature of the state park is the large sinkhole formed by the dissolution of limestone by acidic groundwater over long periods of time. [1] Devil's Millhopper is unique in Florida in terms of its scale; over 100 feet (30 m) of rock layers are exposed.
The Geology of Pennsylvania consists of six distinct physiographic provinces, three of which are subdivided into different sections. Each province has its own economic advantages and geologic hazards and plays an important role in shaping everyday life in the state.
Devil's Millhopper Geological State Park: Alachua: 67 acres (27 ha) 1974: sinkhole pond: 120-foot (36.6 m) deep, 500-foot (152.4 m) wide sinkhole accessed by 232 step stairway Don Pedro Island State Park: Charlotte: 230 acres (93 ha) 1985: Gulf of Mexico: Barrier island accessible only by boat or ferry [14] Dr. Von D. Mizell-Eula Johnson State ...
English: Devil's Millhopper Geological State Park, Gainsville, Alachua County, Florida. Date: Taken on 29 April 2017, 10:43:43: Source: Own work: ... File history ...
Wissahickon Creek is a tributary of the Schuylkill River in Montgomery and Philadelphia Counties, Pennsylvania. [1]Wissahickon Creek rises in Montgomery County, runs approximately 23 miles (37 km) passing through and dividing Northwest Philadelphia before emptying into the Schuylkill River at Philadelphia.
Penns Valley is an eroded anticlinal valley of the Pennsylvania ridge and valley geologic region of the Appalachian Mountain range. The valley is located in southern Centre County, Pennsylvania . Along with the Nittany Valley to the north and east, it is part of the larger Nittany Anticlinorium. [ 1 ]
Suth Branch of Slippery Rock Creek rises east of Hooker, Pennsylvania, and then flows northwest to meet Slippery Rock Creek south of Bovard, Pennsylvania. McMurray Run, right bank: 37.58 mi (60.48 km) 13.29 square miles (34.4 km 2) 19.60 cu ft/s (0.555 m 3 /s)
English: Devil's Millhopper Geological State Park, Gainsville, Alachua County, Florida. Date: Taken on 29 April 2017, 11:36:10: Source: Own work: ... File history ...