Science Quiz / Plate Tectonics Theory

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QUIZ: Can you name the Plate Tectonics Theory

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most active plate boundary
discovered later after the Alaskan earthquake as proposed by George Plafker and colleagues
strong earthquakes originate along this zone, also known as _____
reversed such that north arrow on a compass would point south
happen along Oceanic ridge
determine ages of the volcanic rocks accurately
named Laurasia; made reconstructions of Gondwanaland
explains the bimodal distribution of the Earth's topography
English geophysicist; 'best fit between continents'
commonly 1-2 km deep; opens as sea floor spreading occurs, shallow earthquakes
magnetic stripes parallel to and symmetric around ocean ridges
allowed determination of seafloor age and the rate at which the sea floor had moved
Lithospheric plates move laterally over the asthenosphere carrying continents and sea floor
presence of seamounts and flat-topped inactive volcano cones below sea level
along the crest of some ridges that appears to have opened in response to tensional forces, lithosphere is pulling apart
very important agent in weathering
composed of volcanic rock (basalt) and displays features produced by tension
at the moment the magnetite cooled to this temperature, they record the earth's magnetic field
a fossil of a land reptile found in South America and Africa
floatational property of a rigid lithospher over a weak asthenosphere
presence of magnetized rocks showing reversed polarity on ocean floor along the ridge supported these
study of remnant magnetism of ancient rocks
floatational property of the lithosphere on the asthenosphere
published 'Our Wandering Continents'
a fossil of a plant found in South America and Africa
strong enough to form coherent slabs (plates) that can slide sideways over the weak, underlying asthenosphere
rose from the mantle and spread along both sides of the ridge
published 3D map of the North Atlantic, and later expanded to all of the world's oceans
discovered that the positive and negative magnetic anomalies were records of magnetic field reversals
German meteorologist formulated the Continental Drift hypothesis
revealed the existence of the Mid-Atlantic eidge, which, later, was discovered to extend throughout all of the world's oceans
South African geologist; further developed Wegener's arguments and introduced more geologic evidences
diretion of magnetic field + magnetic inclination =
extensive survey of the sea bottom after WWII and during the Cold War using these
submarine mountain system found in all oceans
first attempt to explain the recent data during that time
hot magma rises from the mantle, intrudes along fractures defining oceaning ridges and forms new crust
suggestion concerned paleomagnetism, magnetic polarity reversals, and the oceanic crust
frequent along the ridge
more than 2,000 km wide, rises about 2.5 km above the ocean floor, part of submarine mountain system 65,000 km long
study of fossils
hypothesis of sea floor spreading
As new oceanic crusts are produce, older crusts are moved sideward.
study of climate
changing of way of magnetic field
tidal forces
this are where oceanic lithosphere descends back into the mantle to be melted and recycled
rate of magnetic stripping
its remnants are in the Pacific Ocean

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