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<p>A recently contoured set of detailed bathymetric charts of the central Pacific Ocean were obtained from the Scripps Institution of Oceanography. The mean topography of the submerged Mid-Pacific Mountain chain was contoured from mean depths calculated for one-degree squares. The hypsometry of this area was determined. A study of the subsidence of the Mid-Pacific Mountains was made using the guyot information available on the charts and in the literature. The guyot data were examined and the dimensions of the 17 most reliable features were studied. The guyot tops are generally deeper in the eastern part of the area than to the west, with an apparent tilt of about 200 fathoms in 1200 nautical miles. The present topography closely resembles the old topography when the guyots were at the surface. It appears that the tops of the mountains have settled a bit relative to the deeper areas, although this is not proven.
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<br>Subjects: Oceanography; GUYOTS; SEAMOUNTS; SUBMARINE TOPOGRAPHIC FEATURES; TECTONICS</div>
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Roberts, Charles Keith</div>
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