div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=usgs-ainch-short-normal-40-explanation-clay-sand-gravel-boulders-700-second-ohm-htmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: USGS · —inch Short Normal 40 EXPLANATION CLAY SAND GRAVEL BOULDERS 700 SECOND OHM- MILLIVOLTS PER Table —30M1 near Lockeford 1200 60 1700 1900 30 ELECTRIC LOGS Potential 60 loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsnetreader034viewer202205210560409389e8e102733e79fd3dhtml5thumbnails1jpg width=140 height=200 divdiv