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Period: to
the theory of plate tectonics
ONLY THE YEARS ARE CORRECT -
Abraham Ortelius
A Flemish mapmaker Abraham Ortelius noted that the coastlines appear to fit together. -
Alfred Wegner
German meteorologist and geophysicist Alfred Wegner proposed that the continents were once joined in a supercontinent called Pangea. -
Arthur Holmes
British geologist Arthur Holmes proposed that convection in the mantle is the force driving continental drift. -
oceanic vessels provided data
Oceanic vessels mapping the ocean floor provided data on the topographic features of the ocean basin, leading to the discovery of mid-ocean ridges. -
Harry H. Hess
American geophysicist Harry H. Hess developed the idea that oceanic crust forms along mid-ocean ridges and spreads out laterally away from the ridges. -
Frederick J. Vine and Drummond H. Mathew
British geologists Frederick J. Vine and Drummond H. Mathews-as well as Canadian geophysicist Laurence W. Morley, who worked independently of the others-postulated that new crust would have a magnetization aligned with earths geomagnetic field. -
A global network of sensors were designed
A global network of sensors designed to detect hydroacoustic signals was installed to monitor compliance with the Nuclear Test-Ban Treaty of 1963. The sensors also recorded earthquake activity. -
Exploration of mid Ocean Ridge between South America and Africa
The vessel Glomar Challenger set sail on an exploration of the mid ocean ridge between South America and Africa. Core samples obtained from drilling revealed that rocks closer to the mid-ocean ridge are younger then rocks that are farther away from the ridges. -
Scientists created three-dimensional images
Scientists created three-dimensional images of the earth’s interior by combining information from many different earthquakes.