Continent Europe and Asia together as a single continent, dubbed "Eurasia". In this model, the world is divided into six continents, with North America and South America considered separate continents. Geologists use the term "continent" in a different manner from geographers. In geology a continent is defined by continental crust: a platform of metamorphic and igneous rock, largely of granitic composition. Some geologists restrict the term 'continent' to portions of the crust built around stable Precambrian "shield", typically 1.5 to 3.8 billion years old, called a craton. The craton itself is an accretionary complex of ancient mobile belts (mountain belts) from
The Continent Makers The Continent Makers The Continent Makers is a science fiction novella by American writers L. Sprague de Camp, part of his "Viagens Interplanetarias" series. It was first published in the magazine "Thrilling Wonder Stories" in the issue for April, 1951. It first appeared in book form in the collection "The Continent Makers and Other Tales of the Viagens", published in hardcover by Twayne Publishers in 1953, and in paperback by Signet Books in 1971. It has also been translated into Portuguese, Dutch, and Italian. Geophysicist Gordon Graham is a participant in the Gamanovia Project, whose mission is to increase the