dating(Any of several techniques such as radioactive dating, dendrochronology, or varve dating, for establishing the age of rocks, palaeontological or archaeological specimens, etc.)
continuous load(The amount or quantity of polluting material found in a transporting agent that flows at a steady rate, in contrast to a sudden or dramatic influx)
resting form(resistant form of life, like spores, resting eggs, seeds; Resistant structure that allows the organism to survive adverse environmental conditions)