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.
Metamorphic rocks form when pre-existing or parent rocks (whether igneous, sedimentary, or even metamorphic) are altered by heat, pressure, and the chemical activity of fluids. When the dominant altering factor is heat, usually from direct contact , it may undergo fundamental change in texture and recrystallization is called contact metamorphism. While regional metamorphism, where rocks texture and minerals are changed by heat and pressure.