By Lindy Elkins-Tanton, Director of the School of Earth and Space Exploration at Arizona State University This the fourth of four blogs written in advance of a meeting at the ETH conference facility in Ascona, Switzerland, to discuss four related questions about the evolution of the solid Earth: “When did Plate Tectonics Begin on Earth?”;… Read More Why is it important to know when and how plate tectonics began, and what was Earth’s tectonic style before plate tectonics?
David Bercovici, Department of Geology & Geophysics, Yale University Impatient person’s summary: To understand how plate tectonics began we have to first figure out why we have plate tectonics at all, and how to identify a plate tectonic planet if it were passing by. The uniqueness of plate tectonic is mostly tied up in its odd boundaries,… Read More How did plate tectonics begin?
Taras Gerya, Institute of Geophysics, ETH-Zurich, Switzerland Busy person’s summary: An egg does not look like a chicken. Therefore, even if we look at the chicken from 1000 different perspectives it will not help us to understand what the egg looked like. Modern plate tectonic Earth is like the chicken, whereas pre-plate tectonic Earth is… Read More What was before plate tectonics?
UPDATE 26 April 2016: On Friday 22 April during the European Geosciences Union 2016 General Assembly in Vienna, a Great Debate was held. The question “Plate tectonics started in the Paleo-Archean or Earlier?” was debated. Please take a look and enjoy! by Bob Stern (University of Texas at Dallas) Busy person’s summary: This is a long blog (~5000… Read More When Did Plate Tectonics Begin on Earth?
by Bob Stern, University of Texas at Dallas Animations are great ways to show Earth processes to students, but the quality of such animations is spotty at best (quality here refers to both the soundness of the science as well as the aesthetic quality of the animation itself). I am a university professor and I… Read More NEW Animation of Subduction Zone Processes Developed for the Undergraduate and 2YC Audience
by Mark Jessell 1 Introduction After a number of years working in this area, this essay summarises my thoughts on the use of research in Structural Geology and Tectonics (SGT) as a development tool, and provide links and references to projects and organisations active in this area. To be clear “development” in this case refers… Read More Structural Geology and Tectonics Research for Development in Africa
Haakon Fossen is a structural geology professor at the University of Bergen, Norway. His website is http://folk.uib.no/nglhe/ I grew up among (proto)mylonitic gneisses, LS-tectonites and other strongly deformed metamorphic rocks in the Caledonides near Bergen, Norway. This was all normal to me, and the first rock that caught my attention, as a kid, was an ultracataclasite.… Read More Let the rocks talk