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Mid-Atlantic Ridge axis cross-section.

Mid-Atlantic Ridge axis cross-section.
Mid-Atlantic Ridge axis cross-section.
Mid-Atlantic Ridge axis cross-section.
Mid-Atlantic Ridge axis cross-section.
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598561
Oberlander, E. Paul
Mid-Atlantic Ridge axis cross-section.
Illustration
01/01/1998
D. Smith ridge.jpg
Date is approximate.
Caption from Oceanus magazine, Vol. 41, No. 1, Pg. 11:
Mid-Atlantic Ridge axis cross-section.
Beneath the surface, dikes (magma conduits) rise vertically and propagate along the axis from a magma body. Three dikes are shown in detail. The most recent is the one to the right, shaded yellow-orange. Where a dike breaches the surface, a fissure eruption occurs. Older flows are transparent. Hummocky ridges and seamounts are built along the axis. Seamounts and flat-topped highs on the flanks of the axial volcanic ridge are fed by lava tubes from the summit.
Illustration by E. Paul Oberlander
© Woods Hole Oceanographic Institution
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