At the same time commercial fishermen began to go out of business as catches declined. Many of these fishermen built cabins and resorts, which were inhabited by more rich people on recreational trips. Certain exclusive clubs also bought land for resort and sport purposes. The Naniboujou Club Lodge was built to attract an exclusive clientele, and a group of Duluth businessmen, the Tettegouche Club, bought 9,346 acres (37.8 km²) of land for use as a private retreat. During the early 20th century, the government decided that continued exploitation of the North Shore would destroy it. In 1909 President Teddy Roosevelt organized the Superior National Forest, putting over 3-million acres (12,000 km²) of the forests between the North Shore and the Canada–US border under protection. The government of Minnesota slowly began to acquire the lands which became the modern North Shore state parks. The first park to be formally organized was Jay Cooke State Park in 1915. In the 1930s the Civilian Conservation Corps established several camps organized along the North Shore and built rustic structures in what would become several North Shore state parks. Today the North Shore Scenic Drive remains a popular tourist route, starting at the historic Glensheen Mansion, passing several state parks, all the way to Grand Portage. Geology The North Shore lies on the north side of the Midcontinent Rift System which ran 1,300 miles (2,000 km) northwest from southern Michigan, through what is now Lake Superior, and south-southwest into Kansas. As the granitic crust was torn apart by continental drift, lava flowed out from 30–60 miles (50–100 km) under the crust and formed basalt. Tectonic forces were not strong enough to continue to separate the two sides of the continental rift; when the rifting stopped, the lava cooled and the heavy crust sank and was filled with sediment. During recent glaciations, a large amount of the basalt and sandstone, which erode much more easily than granite, was removed by the glaciers. This formed the rough, rugged shoreline on the North Shore today. As the glaciers retreated, they left behind eroded igneous material, much of which covers the rocky beaches on the North Shore. The Wisconsin side of the basin and the bottom of the basin filled with the residue from the eroded sandstone and thus are sandy beaches today. The melting water from the retreat of the glaciers ran into the basin and began to