PO-07 Poster - Yule Marble Download Publication Details This full color poster illustrates the legacy of Yule marble, Colorado’s state rock including photographs of the quarry where the marble is mined along with a few of the many national architectural features constructed from it. Digital PDF download. PO-07D Citations Scott, Larry. “PO-07 Poster - Yule Marble.” Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2005. https://doi.org/10.58783/cgs.po07.oopv1238. CGS Publications. https://coloradogeologicalsurvey.org/publications/yule-marble-poster/.