173 Scientific Prospectus

Scientific Objectives

As outlined above, Leg 149 largely succeeded in determining the oceanward and landward bounds of the OCT in the southern Iberia Abyssal Plain. The principal problem now is to investigate the nature of the basement within the OCT itself, to relate it to the general problems of modes of lithospheric extension and rift-to-drift processes, and to test aspects of the models for these tectonic and igneous processes. Leg 173 will attempt to achieve the following objectives:

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