This lack of conformable contact resulted in the early dating of the limestone as Silurian rather than the currently accepted Mississippian. In evaluating the marble cross-section, the United States Geological Survey found the marble is bounded above and below by unconformities. Geologists still debate over Tennessee marble which did not undergo the same type of metamorphism, leaving it in a very unique property somewhere between metamorphic marble and sedimentary limestone. It was formed by contact metamorphism, unlike Vermont marble and Georgia marble, which are the result of regional metamorphism, a process more associated with the orogeny and erosion of mountain ranges on a regional scale. The forces that created Yule Marble make it distinct from all other American marbles. The granite of the Treasure Mountain Dome is visible on the right Geologic Map of Yule Creek Valley – US Geological Survey. Geology Development Cross Section: Yule Marble deposit of the present-day quarry. Technology advancements in quarrying machinery and transportation have reduced, but not solved, the cost problem that afflicts the operation through the present. This challenge has caused the industry and the town of Marble to undergo many boom-and-bust periods since quarrying started in the mid-1880s, making the town emblematic of the economic fluctuations that beset a single-industry economy. Yule's quality comes at a high price due to the cost of quarrying in a high-altitude mountain environment. The size of the deposits enables large blocks to be quarried, which is why the marble for the Tomb of the Unknown Soldier at Arlington National Cemetery, with its 56-long-ton (57 t) die block, was quarried from Yule Marble. It is these qualities for which it was selected to clad the exterior of the Lincoln Memorial and a variety of other buildings throughout the United States, in spite of being more expensive than other marbles. The localized geology created a marble that is 99.5% pure calcite, with a grain structure that gives a smooth texture, a homogeneous look, and a luminous surface. First discovered in 1873, it is quarried underground at an elevation of 9,300 feet (2,800 m) above sea level-in contrast to most marble, which is quarried from an open pit and at much lower elevations. Yule Marble is a marble of metamorphosed Leadville Limestone found only in the Yule Creek Valley, in the West Elk Mountains of Colorado, 2.8 miles (4.5 km) southeast of the town of Marble, Colorado. He and his family reside in Fairfield County, Connecticut.39☂.16′N 107☁0.10′W / 39.03600°N 107.16833°W / 39.03600 -107.16833 ( Quarry site) Lincoln Memorial: exterior is all Yule marble The Tomb of the Unknown Soldier at Arlington is Yule marble He has written extensively on marbles over the years. AUTHOR: Bob Block has been collecting, appraising, auctioning, and dealing in marbles for over 30 years. This book is a reliable source book for anyone with an interest in marbles. The author describes the four factors to look for when determining the value of a marble, and presents an accurate guide to the modern market. Today's marble pricing is explained in detail. Included among the handmade marbles are old marbles of glass, earthenware, minerals, and steel machine-made marbles are identified by their manufacturers and contemporary handmade glass marbles by artisans recapturing the old styles and creating exciting new styles all their own. Christensen and Son, Akro Agate, and more.every major category of marble is presented. Covered in this reliable guide that has stood the test of time are handmade and machine-made marbles of all types, including Indians, Aggies, Steelies, transitionals, M.F. Most of these photos, over 400, are new to this edition and the text is entirely rewritten. More than 500 color photos display marbles of all types in this informative, highly popular, revised guide.
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