This week 黄色直播鈥檚 Department of Earth Sciences is hosting the , where geoscientists from all over the world will gather to explore the latest research examining the geological activity under the Atlantic Ocean.
Over 250-million years ago the Atlantic seabed began splitting apart when the tectonic plates under the Earth鈥檚 crust slid away from each other. That movement created a rift where magma from deep in the Earth could exit, causing an underwater mountain range called the Mid-Atlantic Ridge. The evolution of these changes in the Atlantic Ocean helps geoscientists understand the distribution of resources on both sides of the Atlantic.
To celebrate the university鈥檚 200th anniversary, those in the department invited their international colleagues to Halifax to be a part of something special: granting John F. Dewey, a world-renowned geoscientist residing in Oxford, an honorary degree.
鈥淎s one of the early participants of the 鈥楴ew Global Tectonics鈥� scientific revolution in the 60s, Professor Dewey has become a luminary of 20th century earth science,鈥� explains James Brenan, chair of the Department of Earth Sciences. 鈥淗e turned the geological community on its head by proposing radical new ideas that linked the formation of ocean basins, mountain belts, and massive fault zones to the interactions between Earth鈥檚 tectonic plates.鈥�
Known as 鈥減late pushers,鈥� Dr. Dewey and his colleagues were early supporters of plate tectonic research, a theory that fundamentally changed our understanding of Earth鈥檚 behaviour.
Dr. Dewey delivered the conference鈥檚 plenary address on Monday morning (Aug. 20).
Dr. Dewey (centre) with conference co-chair and Dal Professor Grant Wach (left) and Dal President Richard Florizone.
鈥淚t with great pleasure that we鈥檙e able to meet and listen to Dr. John Dewey, one of the last of his generation,鈥� says Grant Wach, an Earth Sciences professor at 黄色直播 and co-chair of the conference. 鈥淗e shared his insights into some of his observations on the聽evolution of the Atlantic.鈥�
黄色直播 Dr. John F. Dewey
Perhaps critical to Dr. Dewey鈥檚 success as a scientist is his ability to unapologetically question even the most widely-accepted principles in geoscience. In doing so, Dewey ignited a career that allowed him to make outstanding contributions to science.
His scientific leadership provided a clearer understanding of the tectonic evolution of the basins along the Atlantic Margin, and that leadership has been a key driver for many of his students鈥� successful careers too.
Dr. Dewey received his Bachelor of Science with First Class Honours from Queen Mary College in London in 1958. His PhD from Imperial College in 1960 examined the geology of Western Ireland. He spent many days in the field and credits the study of rocks at outcrop to providing him with the skills to develop concepts of global tectonics.
Long is the list of Dr. Dewey鈥檚 many awards and accolades, some of which recognize the top geoscientists in the world.
Dr. Dewey has received the Wollaston Medal, the Geological Society of London鈥檚 highest award granted. It鈥檚 given to geologists who have significant influence through a substantial body of excellent research in either or both 'pure' and 'applied' aspects of the science.
Another is the Lyell Medal, which the Geological Society awards to earth scientists of exceptional quality. The Penrose Medal of the Geological Society of America was awarded to Dewey in recognition of his eminent research in pure geology and for his outstanding original contributions that marked a major advance in the science of geology.
Dr. Dewey is a member of the Royal Society of London and the US National Academy of Sciences. He has also been awarded honorary degrees from Memorial University of Newfoundland and the National University of Ireland.
Dr. Dewey鈥檚 major contributions include geologic models such as 鈥榰plift-generated triple-junctions on plume heads鈥�, 鈥楾ibetan-type plateaux in continental evolution鈥�, and 鈥榗racking continental plates along complex zones of deformation.鈥�
Dr. Dewey鈥檚 insights were documented in a series of highly influential papers that combined detailed knowledge of rock-types, structures, and field relations to reinterpret a variety of large-scale geological features. These include: the formation of the extreme topography of mountain belts such as the Alps and the Himalaya, why ocean basins seem to open and close along the same suture, the origin of unusual linear basins as ancient sites of continental break up, and the identification of ancient seafloor now exposed on dry land.
Cited thousands of times, Dr. Dewey鈥檚 papers outlined concepts that are now firmly entrenched in modern geology textbooks.