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An anthracite pile in Trevorton, Pennsylvania. Anthracite derives from the Greek anthrakítēs (ἀνθρακίτης), literally "coal-like". [9] Other terms which refer to anthracite are black coal, hard coal, stone coal, [10] [11] dark coal, coffee coal, blind coal (in Scotland), [7] Kilkenny coal (in Ireland), [10] crow coal or craw coal, and black diamond.
The anthracite mining industry peaked in production in 1917 and subsequently declined with the exception of periods during World War I and World War II. In the 1950s and 1960s, underground mining operations closed in Schuylkill County and throughout the Coal Region and surface mining became predominate.
Anthracite and bituminous coal were formed in the eastern and western regions of Pennsylvania in the Carboniferous Geological Period. [7] The Pennsylvania Anthracite Region is in the Valley and Ridge Province of the Appalachian Mountains, with the coal located in the folded and faulted terrain of the Province.
Mus rattus was the scientific name proposed by Carl Linnaeus in 1758 for the black rat. [3]Three subspecies were once recognized, but today are considered invalid and are now known to be actually color morphs: [citation needed]
The reserve list specifies different types of coal and includes countries with at least 0.1% share of the estimated world's proven reserves of coal. All data are taken from the German Federal Institute for Geosciences and Natural Resources (BGR) via BP; all numbers are in million tonnes. [1]
A small part of the Centralia mine fire after being exposed during excavation in 1969 Steam rising through a fissure in the ground in the closed-off area of former Pennsylvania Route 61 in 2010.
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A Welsh miner in a coal mine in Pennsylvania's Coal Region in 1910. By the 18th century, the Susquehannock Native American tribe that had inhabited the region was reduced 90 percent [2] in three years of a plague of diseases and possibly war, [2] opening up the Susquehanna Valley and all of Pennsylvania to European settlers.