div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: MR 6 plate-1 · 2012 8 29 · All of the metal mines that have produced signif- icant quantities of ore have been inactive since 1900 Relatively few of the quarries shown were src=https:reader035vdocumentsnetreader035viewer202207151661386a040ad5d20676493dbbhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv