a research instrument primarily used in physics to accelerate streams of charged subnuclear particles to high velocities in order to sort and analyze them.
Calibrated relative methods could be considered to be somewhere between ordinary relative methods and radiometric methods in terms of their ability to produce dates that closely approximate the actual date of a sample.
Amino acid racemization and paleomagnetic dating are generally considered to be either chronometric or calibrated relative methods.
When these events are well dated, geochronology could be considered a reliable calibrated relative dating technique.
Associated evidence may be changes in the frequency of plant species measured by pollen count and other kinds of paleoecology evidence.
Artifacts are usually relatively portable objects such as projectile points, ceramic pots, and relative dating of early human sites by association with index fossils uncovered in the same strata as human evidence.