The top earning professionals in the marine biology field exceeded $95,430 annually in 2012, and those earning in the bottom 10 percent of the profession averaged less than $37,100 in the same year. Top earnings are recorded for those working for the federal government.
metamorphism. 1. the process of change in the form and structure of rocks by the agency of heat, water, and pressure. 2. the change of particular types of rock, as limestone into marble. Also called epigenesis.See also change. â metamorphic, adj.etamorphism-change in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substances.
The chemical components and crystal structures of the minerals making up the rock may change even though the rock remains a solid. Changes at or just beneath Earth's surface due to weathering and/or diagenesis are not classified as metamorphism. Metamorphism typically occurs between diagenesis 200Â°C, and melting 850Â°C.