Relative rock dating is used on sedimentary rocks where as absolute age dating (u-pb, ar/ar etc) are used on minerals from igneous and metamorphic rocks, as they can date the age of crystallization or metamorphism the rock experienced.
Relative dating given the meaning of relative age, it is easy enough to guess what relative dating would be, once one knows that dating, in a scientific context, usually refers to any effort directed toward finding the age of a particular item or phenomenon.
Radiometric dating works by measuring how much a radioactive material has decayed, and using its known decay rate to calculate when the material was solidified there are a variety of ways of doing this here is a common method. Radiometric dating works by determining the ratio of the number of isotopes of an element and the number of isotopes the element it turns into over time.
Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence the method of reading the order is called stratigraphy (layers of rock are called strata) relative dating does not provide actual numerical dates for the rocks. Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
Relative dating methods assign an age relative to that of other items, whereas absolute dating determines age in actual years or millions of years when geologists first embarked on stratigraphic studies, the only means of dating available to them were relative. Relative dating is how scientists determine how old a species is by looking at the undisturbed layers of rock the deeper down the layer is the older the fossil is.
Relative dating is the science of determining the relative order of past events (ie, the age of an object in comparison to another), without necessarily determining their absolute age, (ie estimated age) in geology, rock or superficial deposits, fossils and lithologies can be used to correlate one stratigraphic column with another. Radiometric dating of rocks and minerals using naturally occurring, long-lived radioactive isotopes is troublesome for young-earth creationists because the techniques have provided overwhelming evidence of the antiquity of the earth and life.