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
Mid-Continent Public Library Mid-Continent Public Library Mid-Continent Public Library, officially known as Consolidated Library District #3, is a consolidated public library system serving Clay, Platte, and Jackson Counties in Missouri, with headquarters in Independence, Missouri. Mid-Continent Public Library is the largest public library system in the U.S. state of Missouri by number of volumes and size of budget. Its collection ranks among the 100 largest libraries in America, which includes university, public, and private collections, and is among the nation's 20 largest public library systems. (Note: The Kansas City Public Library is a separate library system with facilities primarily serving Kansas City in