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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 tetrahedral hypothesis is an obsolete scientific theory attempting to explain the arrangement of the Earth's continents and oceans by referring to the geometry of a tetrahedron. Although it was a historically interesting theory in the late 19th and early 20th century, it was superseded by the concepts of continental drift and modern plate ...
The process of plate tectonics continues to shape 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.
There is a ravishing kind of beauty in Tommaso Santambrogio’s lyrical triptych of contemporary Cuban life, “Oceans Are the Real Continents.” With black and white cinematography that ...
By 1915, after having published a first article in 1912, [63] Alfred Wegener was making serious arguments for the idea of continental drift in the first edition of The Origin of Continents and Oceans. [49] In that book (re-issued in four successive editions up to the final one in 1936), he noted how the east coast of South America and the west ...
Determining the boundaries between the continents is generally a matter of geographical convention. Several slightly different conventions are in use. The number of continents is most commonly considered seven (in English-speaking countries) but may range as low as four when Afro-Eurasia and the Americas are both considered as single continents ...
Continents are generally identified by convention rather than any strict criteria. A continent could be a single landmass or a part of a very large landmass, as in the case of Asia or Europe. Due to this, the number of continents varies; up to seven or as few as four geographical regions are commonly regarded as continents.