Hawaii hotspot created at least 129 volcanoes, more than 123 of which are extinct volcanoes, seamounts, and atolls, four of which are active volcanoes, and two of which are dormant volcanoes. They can be organized into three general categories: the Hawaiian archipelago, which comprises most of the U.S. state of Hawaii and is the location of all modern volcanic activity; the Northwestern Hawaiian Islands, which consist of coral atolls, extinct islands, and atoll islands; and the Emperor Seamounts, all of which have since eroded and subsided to the sea and become seamounts and guyots (flat-topped seamounts). Hawaiian volcanoes are characterized by frequent
Dormant Commerce Clause of the Constitution, but the framers did not use the word "dormant". On September 15, 1787, the Framers of the Constitution debated in Philadelphia whether to guarantee states the ability to lay duties of tonnage without Congressional interference so that the states could finance the clearing of harbors and the building of lighthouses. James Madison believed that the mere existence of the Commerce Clause would bar states from imposing any duty of tonnage: "He was more and more convinced that the regulation of Commerce was in its nature indivisible and ought to be wholly under one authority." Roger Sherman disagreed: