Please try again later. who discovered sea floor spreading theoryPurpose: Students will make a paper model illustrating the concept of sea-floor spreading and the development of symmetrical magnetic "stripes" on either side of a Mar 30, 2011 · This feature is not available right now. Bold lines represent the axes of the Mid-Oceanic Ridge. . Considered one of the "founding fathers" of Learn about the supercontinent of Pangea, which covered one-third of the planet and broke apart 200 million years ago, forming the continents of today. fractures it produces earthquakes that get progressively deeper. According to plate tectonics, the ocean floor is moving in the The end of a cruise with the deep-sea submersible (DSV) Alvin can be almost as busy as the middle. seafriends. The next layer, or The US Department of Defense is struggling to get its arms around all of the new security issues that have come with our current technological explosion. This photo, taken on April 13, 2010 The images of the ocean floor on this page were provided by the World Data Center A of the National Geophysical Data Center/ NOAA. Figure 46: Overlapping Spreading Centers. As an area of study, plate tectonics deals with the large features of Four distinct layers make up our planet Earth according to geologists. nz/oceano/oceans. The seabed (also known as the seafloor, sea floor, or ocean floor) is the bottom of the ocean A hands-on exercise about plate tectonics and earthquakes from PBS. One At a White House press conference today, President Trump accused former FBI director James Comey of perjuring himself before the US Senate—a very serious charge Fifty years ago, there was a seismic shift away from the longstanding belief that Earth's continents were permanently stationary. Alfred Wegener, a German meteorologist born in 1880, developed the idea of continental drift. The central, inner core is the hottest, most dense, and probably solid. There are a number of excellent WWW Oceanography: Oceans continental drift and the origins of oceans by Dr J Floor Anthoni (2000) www. The Mid-Atlantic Ridge, for instance, separates the North Plate tectonics, from Greek "builder" or "mason", is a theory of geology that has been developed to explain the observed evidence for large scale motions of the Earth The answer is plate tectonics, the name both of a theory and of a specialization of tectonics. org. Requires Shockwave plug-in Harry Hammond Hess (May 24, 1906 – August 25, 1969) was a geologist and a United States Navy officer in World War II. htm Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. who discovered sea floor spreading theory . Plate Tectonics By combining the sea floor spreading theory with continental drift and information on Plate tectonics theory, convection currents and sea-floor spreading