div class=ts-pagebuttonPage 1button div class=ts-image a href=https:reader042vdocumentsnetreader042viewer20220405125e5f2e5a7341d21c6b16bcc1html5page1jpg target=_blank amp-img class=ts-thumb alt=Page 1: · evolution of the lithosphere beneath the Rocky Mountains—lnitial results from the CD-ROM Upper Pennsylvanian Heebner Shale to the base of the Mississippian Paleogeography src=https:reader042vdocumentsnetreader042viewer20220405125e5f2e5a7341d21c6b16bcc1html5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divdiv