div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: US Geological Survey Publications Warehouse · 2011-04-18 · Sk 10 60 103 Left-hand bar represents granitic rocks middle bar metamorphic foliated rocks right-hand bar limestone src=https:reader033vdocumentsusreader033viewer20220501065f4480e35b838c487e6e4515html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv