Bituminous coal Bituminous coal Bituminous coal or black coal is a relatively soft coal containing a tarlike substance called bitumen or asphalt. It is of higher quality than lignite coal but of poorer quality than anthracite. Formation is usually the result of high pressure being exerted on lignite. Its coloration can be black or sometimes dark brown; often there are well-defined bands of bright and dull material within the seams. These distinctive sequences, which are classified according to either "dull, bright-banded" or "bright, dull-banded", is how bituminous coals are stratigraphically identified. Bituminous coal is an organic sedimentary rock formed by diagenetic and
Rachel Fuller Brown additional minor contributions to the field of bacteriology until their retirement. Brown died on January 14, 1980 at the age of 81 in Albany, New York. Royalties for nystatin totaled $13.4 million. As Brown and Hazen did not want any of the money for themselves, the philanthropic Research Corporation used half for grants to further scientific research and the other half to support what became known as the Brown-Hazen Fund. Both Brown and Hazen received many awards for their collaborative work, the first major prize being the Squibb Award in Chemotherapy in 1955. Brown was also elected fellow of the