Jay Cooke State Park and Grandview areas: Evidence for a major Early Proterozoic-Middle Proterozoic unconformity in Minnesota
M. A. Jirsa, G. B. Morey, 1987. "Jay Cooke State Park and Grandview areas: Evidence for a major Early Proterozoic-Middle Proterozoic unconformity in Minnesota", North-Central Section of the Geological Society of America, Donald L. Biggs
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Jay Cooke State Park occupies nearly 15 mi2 (38 km2) in the northeastern corner of Carlton County in T.48N., R.15 and 16W. (Fig. 1). It is about midway between the village of Thomson and Fond du Lac, the westernmost suburb of Duluth. The park may be reached by following Minnesota 210 from the Carlton-Cromwell interchange with I-35 eastward for approximately 3.5 mi (6 km) through the town of Carlton to the St. Louis River. Immediately after crossing the river at Thomson, the highway turns sharply to the south and 0.1 mi (0.2 km) later enters Jay Cooke State Park (Fig. 2). The Park Headquarters, a picnic area, and an information building are located approximately 2 mi (3.4 km) intothe park. As with all Minnesota state parks, a daily fee or a yearly permit is required to use the park facilities. Minnesota 210 continues through the park along the north side of the St. Louis River for an additional 5.5 mi (9.3 km) where it joins Minnesota 23 in Fond du Lat.
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