Coal the heat and pressure of deep burial causes the loss of water, methane and carbon dioxide and an increase in the proportion of carbon. Thus first lignite (also called "brown coal"), then sub-bituminous coal, bituminous coal, and lastly anthracite (also called "hard coal" or "black coal") may be formed. The wide, shallow seas of the Carboniferous Period provided ideal conditions for coal formation, although coal is known from most geological periods. The exception is the coal gap in the Permian–Triassic extinction event, where coal is rare. Coal is known from Precambrian strata, which predate land plants—this coal is presumed to
Brendan B. Brown Chart. The subject of what the "B" in the middle of Brendan's name stands for has become somewhat memetic between fans with him occasionally suggesting what his middle name could be during interviews. Following on from a 48-date European tour with Wheatus, Brown is now back in the studio working on, among many projects, a seventh album of songs for Wheatus. He collaborated with James Bourne of McBusted on several songs for McBusted's album "McBusted". Brendan B. Brown Brendan B. Brown (born October 11, 1973) is an American musician from Northport, New York. Commonly known as BBB to fans, Brown