usgs · open-file report 1490 3500 3300 3000 2800 900 600 600 600 30 143 2400 2000 800 30 144...

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Page 1: USGS · OPEN-FILE REPORT 1490 3500 3300 3000 2800 900 600 600 600 30 143 2400 2000 800 30 144 30' 30' 145 3600 ... attempt to make a presentation of the sea floor topography in this