Types of dating in archeology
Based on a discipline of geology called stratigraphy, rock layers are used to decipher the sequence of historical geological events.Relative techniques can determine the sequence of events but not the precise date of an event, making these methods unreliable.The half-life of C is approximately 5730 years, which is too short for this method to be used to date material millions of years old.The isotope of Potassium-40, which has a half-life of 1.25 Billion years, can be used for such long measurements.In addition, carbon dating by the use of half lives could be utilized.However, the problem that comes here is that in an arid climate some types of trees will die but will hold their position.Then when someone comes along and uses the tree for construction purposes or decoration, archaeologist misjudge the age of the site because the woods carbon dating will be older than when the person actually cut down the tree.I can imagine that this causes many problems for archaeologist because now whenever analyzing wood for its date, one must be skeptical as to if it will give information that is actually helpful for dating.
In archaeological sites, natural and human-generated materials occur together in layers.The most recently deposited materials are the youngest and are always at the top. It always applies except when some type of disturbance has occurred.Strata in archaeological sites provide archaeologists with temporal and spatial information.b) Absolute These methods are based on calculating the date of artefacts in a more precise way using different attributes of materials.This method includes carbon dating and thermoluminescence.
These layers, called strata, form a record of past events that archaeologists analyze and interpret.