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VIDEO: Elements of a newly discovered process in plate tectonics include a mass (rock slab weight), a pulley (trench), a dashpot (microcontinent), and a string (oceanic plate) that connects these elements. view more
Credit: Erkan Gün/University of Toronto
TORONTO, ON - Geoscientists at the University of Toronto (U of T) and Istanbul Technical University have discovered a new process in plate tectonics which shows that tremendous damage occurs to areas of Earth s crust long before it should be geologically altered by known plate-boundary processes, highlighting the need to amend current understandings of the planet s tectonic cycle.
January 13, 2021 at 11:00 am
Some great ideas shake up the world. For centuries, the outermost layer of Earth was thought to be static, rigid, locked in place. But the theory of plate tectonics has rocked this picture of the planet to its core. Plate tectonics reveals how Earth’s surface is constantly in motion, and how its features volcanoes, earthquakes, ocean basins and mountains are intrinsically linked to its hot interior. The planet’s familiar landscapes, we now know, are products of an eons-long cycle in which the planet constantly remakes itself.
When plate tectonics emerged in the 1960s it became a unifying theory, “the first global theory ever to be generally accepted in the entire history of earth science,” writes Harvard University science historian Naomi Oreskes, in the introduction to
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Summary
The 30th of July 2020 marked the centenary of the birth of a woman who was central to the development of the field of Earth sciences: Marie Tharp, a pioneer of ocean floor cartography and marine geology. Her work was crucial in reintroducing a mobilist (drift) vision of Earth and for the development of the plate tectonics revolution in the early 1960s.