North America, the planet's 3rd largest continent, includes (23) countries and dozens of possessions and territories. It contains all Caribbean and Central America countries, Bermuda, Canada, Mexico, the United States of America, as well as Greenland - the world's largest island.Sep 19, 2016
Three countries (Canada, the United States, and Mexico) make up most of North America's land mass; they share the continent with 34 other island countries in the Caribbean and south of Mexico.
During the Proterozoic a series of terranes were accreted onto the North American craton, forming the Piedmont of the central Appalachians. ... The bedrock of the plateau formed about 470 million years ago during the Taconic orogeny, when a volcanic island arc collided with the ancestral North American Continent.
Norse captain Leif Ericson is believed to have reached the Island of Newfoundland circa 1000 AD. They named their new discovery Vinland. The only Norse site yet discovered in North America is at L'Anse aux Meadows, Newfoundland and Labrador.
For one thing, it could shed new light on the early Norse experience in North America, first substantiated by Helge Ingstad, an explorer, and his wife, Anne Stine Ingstad, an archaeologist. In 1960, they discovered the remains of a Viking encampment in Newfoundland dating to the year 1000.