div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentusgs-open-file-report-1490-3500-3300-3000-2800-900-600-600-600-30-143-2400-2000htmlpage=1 data-page=1 class=trans-thumb lazyload alt=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 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader036fdocumentsusreader036viewer20220630075fb982648be72169d46c9a78html5thumbnails1jpg width=140 height=200 divdiv