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Expanded editions during the 1920s presented further evidence. (The first English edition was published in 1924 as The Origin of Continents and Oceans, a translation of the 1922 third German edition.) The last German edition, published in 1929, revealed the significant observation that shallower oceans were geologically younger.
The speculation that continents might have "drifted" was first put forward by Abraham Ortelius in 1596. A pioneer of the modern view of mobilism was the Austrian geologist Otto Ampferer. [3] [4] The concept was independently and more fully developed by Alfred Wegener in his 1915 publication, "The Origin of Continents and Oceans". [5]
The concept that the continents once formed a contiguous land mass was hypothesised, with corroborating evidence, by Alfred Wegener, the originator of the scientific theory of continental drift, in three 1912 academic journal articles written in German titled Die Entstehung der Kontinente (The Origin of Continents). [11]
He backed the moving of continents proposed by Alfred Wegener and decided on the expanding Earth idea as the mechanism for this and was the main proponent of this hypothesis. [6] Carey's expanding earth bears many resemblances to the current model, including supercontinents dividing and going adrift, zones of new crust being generated in deep ...
This was proposed by historian Leo Africanus (1488-1554), who suggested the Greek word phrike (φρίκη, meaning "cold and horror"), combined with the negating prefix "a-", thus indicating a land free of cold and horror. However, as the change of sound from ph to f in Greek is datable to about the 10th century, it is unlikely this is the origin.
In the mid-17th century, Peter Heylin wrote in his Cosmographie that "A Continent is a great quantity of Land, not separated by any Sea from the rest of the World, as the whole Continent of Europe, Asia, Africa." In 1727, Ephraim Chambers wrote in his Cyclopædia, "The world is ordinarily divided into two grand continents: the Old and the New."
The process of plate tectonics continues to shape the Earth's continents and oceans and the life they harbor. Eons In geochronology , time is generally measured in mya (million years ago), each unit representing the period of approximately 1,000,000 years in the past.
From these accounts he wrote a detailed prose account of what was known of the world. A similar work, and one that mostly survives today, is Herodotus' Histories. While primarily a work of history, the book contains a wealth of geographic descriptions covering much of the known world.