Sea floor spreading dating

09-Feb-2018 16:58

The term ophiolite was originally used by Alexandre Brongniart later modified its use to include serpentine, pillow lava, and chert ("Steinmann's trinity"), again based on occurrences in the Alps.The term was little-used in other areas until the late 1950s to early 1960s, with the recognition that this assemblage provided an analog for oceanic crust and the process of seafloor spreading.In the centre one sees the Atlantic Ocean and east of Africa the Indian Ocean, looking much smaller due to the curvature of the globe.

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Although very noticeable from space, the glaciers and ice caps contain only 1.6% of the total amount of water.In short, the particles found in sediment on the seafloor vary considerably in composition and record a complex interplay of processes that have acted to form, transport, and preserve them.