coal rank thermometer

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Appalachian origins revealed through the "coal-rank thermometer"
... Appalachian origins revealed through the "coal-rank thermometer" The APPALACHIAN "MOUNTAINS" The Appalachian Mountains are not changeless, monolithic sentinels that have stood in ... today rest at elevations ranging from 0 to 3,000 feet. By virtue of the "coal-rank thermometer" we know this region was elevated 15,000 to 23,000 feet by the end ...
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