div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: USGS · 2011 3 16 · 90 68 pc 68 51- 1 pc 90 85 LINE pc 60 SECTION ALONG 60 Contour intervol 20 feet Datum is assumed 120 AND SECTION Geology and topography by VRWilmarth src=https:reader036fdocumentsnetreader036viewer20220714116106ddc41b88671c0871f5ebhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv