Both the lowering of the Earth's surface temperature and the evolution of many new types of animals could result from a decrease in atmospheric carbon dioxide and a rise in oxygen caused by the presence on land of lichen fungi and plants at this time, which our research suggests, Hedges says.
Baryte or barite (Ba S O 4) is a mineral consisting of barium sulfate.The baryte group consists of baryte, celestine, anglesite and anhydrite. Baryte is generally white or colorless, and is the main source of barium.Baryte and celestine form a solid solution (Ba,Sr)SO 4.aryte that is used as an aggregate in a heavy cement is crushed and screened to a uniform size. Most baryte is ground to a small, uniform size before it is used as a filler or extender, an addition to industrial products, in the production of barium chemicals or a weighting agent in petroleum well drilling mud.
Apatite is the defining mineral for 5 on the Mohs scale. Hydroxyapatite, also known as hydroxylapatite, is the major component of tooth enamel and bone mineral.A relatively rare form of apatite in which most of the OH groups are absent and containing many carbonate and acid phosphate substitutions is a large component of bone material.hosphorite is a phosphate-rich sedimentary rock, that contains between 18% and 40% P 2 O 5. The apatite in phosphorite is present as cryptocrystalline masses referred to as collophane.