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asthenosphere    
n. 岩流圈

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  • Asthenosphere - Wikipedia
    It is the source of mid-ocean ridge basalt (MORB) and of some magmas that erupt above subduction zones or in regions of continental rifting The asthenosphere is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and isostatic adjustments
  • Asthenosphere | Mantle Layer, Plate Tectonics Thermal Plumes | Britannica
    Asthenosphere, zone of Earth’s mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere The asthenosphere extends from about 100 km (60 miles) to about 700 km (450 miles) below Earth’s surface
  • 5 Asthenosphere Facts: What is the Asthenosphere? - Earth How
    What is the Asthenosphere? The asthenosphere is a semi-fluid layer located in the upper part of the Earth’s mantle, situated beneath the lithosphere It plays a crucial role in plate tectonics, as its partially molten and ductile nature allows for the movement of tectonic plates above it
  • Lithosphere and Asthenosphere - Geology In
    The asthenosphere serves as a crucial lubricating layer, facilitating the movement of the lithospheric plates above it Heat from Earth's interior generates convection currents within the asthenosphere, which are the primary drivers of plate tectonics
  • ASTHENOSPHERE Definition Meaning - Merriam-Webster
    The meaning of ASTHENOSPHERE is a zone of a celestial body (such as the earth) which lies beneath the lithosphere and within which the material is believed to yield readily to persistent stresses
  • What Is the Asthenosphere and Why Is It Important?
    The asthenosphere is a mechanically weak layer of Earth’s upper mantle, sitting just below the rigid lithosphere, roughly 50 to 200 kilometers beneath the surface under the oceans
  • 10 Things about the Asthenosphere - Geology Base
    The asthenosphere is one of the most special or unique layers of the Earth not known to other planets like Mars or Venus It is what lubricates the Earth’s tectonic plates, which are responsible for earthquakes, volcanism, and mountain building
  • What Is the Asthenosphere? The Layer Beneath Earths Lithosphere
    The asthenosphere is a hot, mechanically weak region of Earth’s upper mantle that lies beneath the lithosphere, the rigid outer shell that includes the crust and the uppermost mantle
  • Mantle - Education | National Geographic Society
    The asthenosphere is the denser, weaker layer beneath the lithospheric mantle It lies between about 100 kilometers (62 miles) and 410 kilometers (255 miles) beneath Earth’s surface





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