East Tennessee

===Mining===
The Ridge-and-Valley region of East Tennessee is home to several of the largest deposits of [[zinc]] in the United States, including the Mossy Creek deposits in [[Jefferson County, Tennessee|Jefferson County]] and the [[Grainger County, Tennessee|Grainger]] and [[Hancock County, Tennessee|Hancock]] counties' deposits, respectively.<ref name="zincdeposits">{{cite journal |last1=Thompson |first1=Tommy |title=Zinc Deposits in East Tennessee |journal=Society of Economic Geologists Guidebook Series |date=January 1, 1992 |volume=14 |url=https://pubs.geoscienceworld.org/segweb/books/book/2115/chapter/114712631/Itinerary |access-date=January 5, 2022 |publisher=Society of Economic Geologists |doi=10.5382/GB.14.Ch1 |isbn=9781934969670}}</ref>

[[Tennessee marble]], a rare crystalline form of [[limestone]], is found only in several deposits in the East Tennessee region in the entire world. Its strong resemblance to true marble when polished has made it a popular construction material found in several structures and monuments around the United States.<ref name=powell>{{cite web |first1=Wayne G |last1=Powell |url=http://academic.brooklyn.cuny.edu/geology/powell/613webpage/NYCbuilding/TennesseeMarble/TennesseeMarble.htm |title=Tennessee Marble |access-date=November 20, 2011}}</ref> The stone occurs in belts of [[Ordovician]]-period rocks known as the [[Holston Formation]],<ref name=powell /> Tennessee marble achieved such popularity in the late-19th century that [[Knoxville, Tennessee|Knoxville]], the stone's primary finishing and distribution center, became known as "The Marble City."<ref>"Ask Doc Knox," "[https://web.archive.org/web/20100703020837/http://blogs.metropulse.com/ask_dr_knox/2010/05/whats-with-all-this-marble-cit.html What's With All This 'Marble City' Business?]"  ''Metro Pulse'' May 10, 2010.  Accessed at the Internet Archive, October 5, 2015.</ref>