Sea Beam/SeaMARC II Studies of the East Pacific Rise and its Flanks in Preparation for a Geologic/Acoustic Natural Laboratory.
1997
Macdonald, Ken C.
The primary project objective, to establish a long-term Geologic/Acoustic Natural Laboratory (GANL) near 7 deg 50'-10 deg 30'N on the East Pacific Rise, has been achieved and published in a widely circulated map series. The GANL for a fast-spreading environment includes total coverage at a large scale within the area using combined Sea Beam and SeaMARC II bathymetry and side scan sonar. This objective has been achieved not only for the designated ONR Laboratory, but also for the East Pacific Rise and its flanks from 7 deg N to 18 deg N. We have also completed most of the quantitative interpretation of these data to assess the roles of faulting vs. volcanism in creating the ubiquitous abyssal hills of the ocean floor, the most common yet poorly understood terrain element on the earth's solid surface.
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