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If a tree trunk was used as a house beam, and archaeologists can use dendrochronology to date when the tree was cut down, they have a concrete reference point for dating that house.Unless the beam was put in later, the house was built when the tree was cut down, or slightly later.Ancient sites in England, Malta, and elsewhere turned out to be older than once thought.With this new information, scientists were able to paint a more accurate picture of European prehistory. An absolute dating method tells the excavator the specific date of the material being studied (plus or minus a margin of error).
Each site contains evidence of different artifact styles (such as pottery of different styles).
This sort of information helps archaeologists to put objects into an age sequence.
Relative dating does not give archaeology absolute dates that can be tied into a calendar.
Probably the most well known dating method is carbon-14 (C-14) dating.
This method of absolute dating is based on the measurement of the radioactive decay of the C-14 atom.