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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
  • 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 and Why Is It Important?
    The asthenosphere is a layer deep within Earth that acts as a fundamental engine for the planet’s surface dynamics This region of the upper mantle is characterized by mechanical weakness and directly underlies the rigid outer shell we inhabit
  • Layers of the Earth - Science Notes and Projects
    Beneath the lithosphere, from about 100 to 350 km, lies the asthenosphere The asthenosphere is the part of the upper mantle that exhibits plastic (or ductile) behavior
  • What is the Asthenosphere? - Definition and Characteristics With Diagrams
    The asthenosphere is directly below the lithospheric mantle and is formed by partially molten solid rocks that are subject to strong pressures and high temperatures For this reason, the asthenosphere behaves as a plastic and ductile layer that can have some ability to flow
  • The Asthenosphere: The mysterious world beneath - ZME Science
    In a nutshell, the asthenosphere is like Earth’s “lubricant layer,” facilitating the motion of tectonic plates and playing a crucial role in the dynamic processes that shape our planet
  • Mantle - 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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