OCS 1005 Lecture : Lecture 5
15 Mar 2019
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Document Summary
The accuracy of an echo sounder can be affected by water conditions and bottom contours: multibeam systems can provide more accurate measurements than echo sounders do. Moving above the ocean surface at 7 km a second, Geosat bounce 1,000 pulses of radar energy off the ocean every second. Continent and greenland: a hypsographic curve is a plot of the area of the earth"s surface above any given elevation or depth above or below sea level. Very little volcanic or earthquake activity is associated with passive margins: active margins known as pacific-type margins, are located near the edges of converging plates. The ocean ridge system stretches some 65,000 km around the earth: transform faults are fractures along which lithospheric plates slide horizontally past one another. Transform faults are the active part of fracture zones: seamounts are volcanic projections from the ocean floor that do not rise above sea level.
