History of anthracite coal mining in Pennsylvania railroad system made transporting the anthracite exponentially easier, and by the 1860s anthracite coal was regularly supplying urban centers like Philadelphia and New York City and was helping to fuel the American Industrial Revolution. Anthracite and bituminous coal were formed in the eastern and western regions of Pennsylvania respectively during the Pennsylvanian time in the Carboniferous Geological Period (“History of Anthracite Coal Mining”). 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. The anthracite fields are maintained in synclinal basins that
Anthracite budgerigar mutation Anthracite budgerigar mutation The Anthracite budgerigar mutation is an extremely rare mutation that occurs in the budgerigar. The mutation, similar to the Violet budgerigar mutation, causes a difference in the coloring of budgerigars. Anthracites have black or very dark gray feathers, possibly with some white depending on the budgerigar in particular. The mutation is believed to have started in Germany, and tends to be local to that area. Currently, most owners wishing to obtain an Anthracite need to import these budgerigars from Germany. The description and genetic behaviour of the Anthracite and English Grey are identical, insofar as this can