div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader042fdocumentsnetreader042viewer20220404135f09089e7e708231d424e9a8html5page1jpg target=_blank img data-url=documentpp-489-plate-3-6-usgs-united-2800-2600-2400-2200-2000-1800-1600-1400-1200htmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: pp 489 plate 3 6 - USGS · united 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 2600 2400 2200 0000000 2000 1800 1600 1400 1200 1000 800 600 states department loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader042fdocumentsnetreader042viewer20220404135f09089e7e708231d424e9a8html5thumbnails1jpg width=140 height=200 adivdiv