Note 4
When specifying the
tR stress on the ridge trajectory,
the ridge push is actually considered as a linear force applied at the divergent
boundary. This approximation was adopted by some authors (e.g. see [Gölke and Coblenz, 1996; Richardson
et al., 1979]). Apparently, a more adequate idea is to distribute
this force over a band of a finite width adjacent to MAR. In particular, Parsons
and Richter [1980] distributed the ridge push over an oceanic
lithosphere younger than 40 Ma. The ridge push specification on the MAR axis
is a reasonable approximation conforming to the purposes of the present work, because
the push effects are analyzed at distances much larger than the width of the aforementioned
band of young oceanic lithosphere.
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