Though relative dating can determine the order in which a series of events occurred, not when they occurred, it is in no way inferior to radiometric dating; in fact, relative dating by biostratigraphy is the preferred method in paleontology, and is in some respects more accurate.Relative dating methods allow one to determine if an object is earlier than, later than, or contemporary with some other object.If archaeologists know how pottery styles, glazes, and techniques have changed over time they can date sites based on the ratio of different kinds of pottery.This also works with stone tools which are found abundantly at different sites and across long periods of time.Zircon has a very high closure temperature, is resistant to mechanical weathering and is very chemically inert.Zircon also forms multiple crystal layers during metamorphic events, which each may record an isotopic age of the event.
It estimates the order of prehistoric and geological events were determined by using basic stratigraphic rules, and by observing where fossil organisms lay in the geological record, stratified bands of rocks present throughout the world.
It does not, however, allow one to independently assign an accurate estimation of the age of an object as expressed in years.
The most common relative dating method is stratigraphy.
All trees of the same species in an area usually have roughly the same pattern of growth.
Since weather patterns tend to run in cycles of a number of years, the sequence of tree-rings in a region will also reflect the same cycling, as illustrated by the graph below.