Congenital anomalies are also known as birth defects, congenital disorders or congenital malformations. Congenital anomalies can be defined as structural or functional anomalies (e.g. metabolic disorders) that occur during intrauterine life and can be identified prenatally, at birth or later in life.
But unlike in 2012 when Wyoming was home to nine of the US' ten biggest coal mines, the Cowboy State had a bit more competition last year. North Dakota's Freedom mine has taken the spot of the US' tenth biggest coal producer, as Wyoming's Caballo slid off the top-ten chart. All production figures are in metric tonnes.
HISTORY & GEOLOGY. 1  Coal was first discovered in what is now West Virginia in 1742 by John Peter Salley in what is now Boone County. 2  Coal occurs in 53 of West Virginia's 55 Counties only Jefferson and Hardy in the eastern panhandle have no coal. 3  Forty-three counties have reserves of minable (economic) coal. 4  There are 117 named coal seams in West ...