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单词 triple junction
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triple junction
triple junction n. Geology a region at which the boundaries of three lithospheric plates meet; (Geology), a point where three grain boundaries meet at angles of approximately 120 degrees.
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the world > the earth > structure of the earth > [noun] > lithospheric plate > junction
triple junction1969
the world > the earth > structure of the earth > constituent materials > rock > texture or colour > [noun] > texture > meeting of grain boundaries
triple junction1969
1969 Nature 11 Oct. 125/2 Evolution of such triple junctions can produce many of the changes which would otherwise appear to have been caused by a change in the direction or magnitude of the relative motion between plates.
1976 R. H. Vernon Metamorphic Processes v. 137 Three grains meet at a point (‘triple junction’), the inter~facial angles closely approximating 120°.
1979 B. F. Mallory & D. N. Cargo Physical Geol. xvii. 437 Examination of these triple junctions shows that the three branches of the junction may involve convergence, divergence, or translational (sideways) movement.
1982 S. Aramaki & T. Ui in R. S. Thorpe Andesites iii. 260/1 Japan and the surrounding islands form three chains of island arcs which meet at a trench-trench-type triple junction located at c. 34° N and 142° E.
extracted from tripleadj.adv.
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