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Figure 4.
Sketch showing the relationship of the site locations to the various
characteristic features of the OCT in the Iberia Abyssal Plain. Thick lines bind
the three main types of crust identified in the OCT. Triangles mark the trend of
the peridotite ridge, proposed from seismic reflection profiles by Beslier et
al. (1993). Thinner bold lines mark the positions of seafloor spreading magnetic
anomalies J and M0, chosen from a reduced-to-the-pole magnetic anomaly contour
chart (S.R. Srivastava, pers. comm., 1993) and the eastern edge M3(E) of the
magnetic block used in a two-dimensional seafloor spreading model to model
anomaly M3. Thin lines are seismic refraction profiles reported by Whitmarsh,
Miles, and Mauffret (1990).
![](images/fig4.jpg)
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