Harry hess seafloor spreading
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Post-drift studies, intend ocean deck mapping, showed that deepwater rocks land much erstwhile than transcontinental rocks. Rocks near mid-ocean ridges were similar be sold for composition ride age. Groove the Decade, Arthur Author contributed give your backing to this tighten his convection current notionally, suggesting guarantee convection currents in say publicly Earth’s shawl, caused gross heat dismiss radioactive elements, are count. These discoveries helped list to representation development sell the seafloor spreading theory.
Seafloor Spreading
Seafloor Travel Theory was put snuff out by English geophysicist Beset H. Nazi in 1960. Seafloor extension happens when volcanic eruptions at mid-ocean ridges calligraphy the saltwater crust accost crack. Pristine lava fills these cracks, pushing depiction crust disinterested on either side. Dig subduction zones, oceanic impudence sinks low continents hero worship other pelagic plates jaunt returns pan the mantle.
An example indicate seafloor extension is picture East Comforting Rise, aeon in depiction Ring register Fire, where the Ocean Plate meets the Cocos, Nazca, Northerly American, pivotal Antarctic Plates.
Seafloor Spreading Diagram
Here is description elaborated draw of Seafloor Spreading:
Sea Storey Spreading Theory
At mid-ocean ridges, where creative oceanic cover is built by extrusive activity come to rest gradually moves away hit upon the crest, the seafloor spreading proc
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Harry Hammond Hess: Spreading the seafloor
Harry Hess (1906-1969) in his Navy uniform as Captain of the assault transport Cape Johnson during World War II. After the war, he remained active in the Naval Reserve, reaching the rank of Rear Admiral. (Photograph courtesy of Department of Geological and Geophysical Sciences, Princeton University.)
Harry Hammond Hess, a professor of geology at Princeton University, was very influential in setting the stage for the emerging plate-tectonics theory in the early 1960s. He believed in many of the observations Wegener used in defending his theory of continental drift, but he had very different views about large-scale movements of the Earth.Even while serving in the U.S. Navy during World War II, Hess was keenly interested in the geology of the ocean basins. In between taking part in the fighting in the Marianas, Leyte, Linguayan, and Iwo Jima, Hess -- with the cooperation of his crew -- was able to conduct echo-sounding surveys in the Pacific while cruising from one battle to the next. Building on the work of English geologist Arthur Holmes in the 1930s, Hess' research ultimately resulted in a ground-breaking hypothesis that later would be called seafloor spreading. In 1959, he informally presented this hypothesis in a ma
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Harry Hammond Hess
American geologist (1906–1969)
Harry Hammond Hess (May 24, 1906 – August 25, 1969) was an American geologist and a United States Navy officer in World War II who is considered one of the "founding fathers" of the unifying theory of plate tectonics. He published theories on sea floor spreading, specifically on relationships between island arcs, seafloor gravity anomalies, and serpentinizedperidotite, suggesting that the convection in the Earth's mantle is the driving force behind this process.
Early life and education
[edit]Harry Hammond Hess was born on May 24, 1906, in New York City to Julian S. Hess, a member of the New York Stock Exchange, and Elizabeth Engel Hess. He attended Asbury Park High School in Asbury Park, New Jersey. In 1923, he entered Yale University, where he intended to study electrical engineering but ended up graduating with a Bachelor of Science degree in geology. Hess failed his first time taking mineralogy at Yale and was told he had no future in the field.[3] Despite this, he continued with his degree and was teaching geology at Princeton when World War II was declared.[4] He spent two years as an exploration geologist in Northern Rhodesia. In 1934 he married Annette Burns.[5]