How continents were recycled
Plate tectonics shape the Earth's dynamic surface. But when did these dynamics first emerge? And will the present-day continents last forever?
Earth Sciences
Aug 23, 2017
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227
News tagged with continental crust
Continental crust model illuminates processes that took place three to four billion years ago
For the first time, ETH scientists have successfully recreated the formation of continental crust in the Archean using a computer simulation. The model helps scientists to better understand processes that took place three ...
Earth Sciences
May 10, 2017
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A new interpretation of petrogenesis of Earth's early continental crust
The Earth's continental crust was mainly formed in the Archean period, ~2.5 to 4.0 billion years ago, and is chiefly composed of tonalite, trondhjemite and granodiorite (TTG rocks). These three kinds of rock preserve pivotal ...
Earth Sciences
May 1, 2017
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Earth's first example of recycling—its own crust
Rock samples from northeastern Canada retain chemical signals that help explain what Earth's crust was like more than 4 billion years ago, reveals new work from Carnegie's Richard Carlson and Jonathan O'Neil of the University ...
Earth Sciences
Mar 16, 2017
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224
Geologists find key indicator of carbon sources in Earth's mantle
Scientists have found a key indicator in determining whether the presence of carbon, found in the Earth's mantle, is derived from continental crust - a step toward better understanding the history of crustal formation on ...
Earth Sciences
Nov 9, 2016
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411
Case of Earth's missing continental crust solved—it sank
How do you make half the mass of two continents disappear? To answer that question, you first need to discover that it's missing.
Earth Sciences
Oct 5, 2016
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Scientists uncover insights into the formation of Earth's oldest continental crust
Addressing fundamental unknowns about the earliest history of Earth's crust, scientists have precisely dated the world's oldest rock unit at 4.02 billion years old. Driven by the University of Alberta, the findings suggest ...
Earth Sciences
Sep 19, 2016
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How does Earth's continental crust form? Scientists have a new bottom-up theory
Deep beneath Alaska's Aleutian Islands, down where the pressure and temperatures have become so high that rock starts to flow, new continental crust is being born.
Earth Sciences
Feb 23, 2016
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Ancient rocks of Tetons formed by continental collisions
University of Wyoming scientists have found evidence of continental collisions in Wyoming's Teton Range, similar to those in the Himalayas, dating to as early as 2.68 billion years ago.
Earth Sciences
Jan 29, 2016
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Study zeros in on plate tectonics' start date
Earth has some special features that set it apart from its close cousins in the solar system, including large oceans of liquid water and a rich atmosphere with just the right ingredients to support life as we know it. Earth ...
Earth Sciences
Jan 21, 2016
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