Anthracite mined on the generally flat lying and undeformed sedimentary rocks further west on the Allegheny Plateau of Kentucky and West Virginia, Eastern Ohio, and Western Pennsylvania. In the same way the anthracite region of South Wales is confined to the contorted portion west of Swansea and Llanelli, the central and eastern portions producing steam coal, coking coal and domestic house coals. Structurally, anthracite shows some alteration by the development of secondary divisional planes and fissures so that the original stratification lines are not always easily seen. The thermal conductivity is also higher; a lump of anthracite feels perceptibly colder when
Anthracite iron differently designed furnaces. The first American smelt of Anthracite Pig Iron was performed July 4, 1840 by principal-partners David Thomas, Josiah White and Erskine Hazard at their Lehigh Crane Iron Works in their first hot blast furnace along Catasauqua Creek aided by Samuel Thomas and the employees of the LCIW, in what became Catasauqua in Northampton County, Pennsylvania. The technology enabled industries the chance to produce cast iron sufficient to demand and eventually adapt production to also feed the demand to generate wrought iron and steel. These useful materials are achieved by adding additional processing — by taking pig iron