It has long been recognized that the properties of the Cook-Austral chain (Fig. 1) of volcanoes in the South Pacific are difficult to reconcile with the theory that volcanic activity in plate interiors is produced by the drift of tectonic plates over narrow, stationary plumes of hot mantle ...
Can you please explain the theory of relativity? Why is time a scalar quantity if you can use it in a past/future manner? Why do weather satellites circle the earth at different altitudes? How would you explain the Cenozoic evolution of the Nor...
Why does earth bulge at the equator? What will happen to the convection currents in the mantle if the Earth's interior eventually cools down? From a plate tectonic perspective, how does the orogenic activity that occurred in the Cordilleran mobile belt during the Mesozoic...
c. Cite evidence, from such sources as plate tectonic theory, ice cores, CO2 measurements, and fossil finds, to show that the earth’s climate has changed in the past, is currently changing, and is expected to change in the future. ...
Soon after the plate tectonics theory was established, subducting slabs were recognised as a fundamental driver of flow in the Earth’s mantle1,2,3. The sinking of oceanic lithosphere indeed induces mantle flow through viscous drag associated with slab down-dip motion4and through a pressure change...
英语翻译Researchers explain that that earthquake off the coast of Japan resulted from a thrust event between the Pacific tectonic plate and an extension of the North American tectonic plate.
the reversed motion of a ring fault, accompanying e.g., inflation and deflation phases of the volcanic system45,46. In the frame of tectonic processes, focal mechanism reversals have been reported more sporadically and generally attributed to stress changes induced by large earthquakes and ...
but it can rift apart by thinning and heating to form new oceans. In theory, continental plate subsides in proportion to the amount it is thinned and subsequently by the rate it cools down. However, seismic and borehole data from continental margins like the Atlantic show that the upper surf...
This process usually creates amountain rangeon the second tectonic plate, as that starts to ride over the first and the surface geology is rucked and folded upwards. Also, water entrained in the subducting plate may rise into the second plate and provokesvolcanism, often resulting in avolcanic ...
Volcanic seismicity during silicic spine eruptions often involves recurrent excitation of similar sources at stationary depth just beneath the crater. The mechanics of volcanic spine extrusion may be compared to those of high-temperature, industrial metal working. We thus use slip-line field theory to...