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A continent is a large geographical region defined by the continental shelves and the cultures on the continent. [1] In the modern day, there are seven continents. However, there have been more continents throughout history. Vaalbara was the first supercontinent. [2] Europe is the newest continent. [3]
The Ordovician period started at a major extinction event called the Cambrian–Ordovician extinction event some time about 485.4 ± 1.9 Ma. [10] During the Ordovician the southern continents were collected into a single continent called Gondwana. Gondwana started the period in the equatorial latitudes and, as the period progressed, drifted ...
The British Empire (red) and Mongol Empire (blue) were the largest and second-largest empires in history, respectively. The precise extent of either empire at its greatest territorial expansion is a matter of debate among scholars.
Throughout the history of the Earth, there have been times when continents collided and formed a supercontinent, which later broke up into new continents. About 1000 to 830 Ma, most continental mass was united in the supercontinent Rodinia.
In geology, a continent is defined as "one of Earth's major landmasses, including both dry land and continental shelves". [3] The geological continents correspond to seven large areas of continental crust that are found on the tectonic plates , but exclude small continental fragments such as Madagascar that are generally referred to as ...
The four continents, plus Australia, added later.. Europeans in the 16th century divided the world into four continents: Africa, America, Asia, and Europe. [1] Each of the four continents was seen to represent its quadrant of the world—Africa in the south, America in the west, Asia in the east, and Europe in the north.
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c. 180 Ma – Pangaea splits into two major continents: Laurasia in the north and Gondwana in the south. c. 176 Ma – First stegosaurs. c. 170 Ma – First salamanders and newts evolve. Cynodonts go extinct. c. 165 Ma – First rays and glycymeridid bivalves. c. 164 Ma – The first gliding mammal, volaticotherium, appears in the fossil record.