For example, techniques based on isotopes with half lives in the thousands of years, such as Carbon-14, cannot be used to date materials that have ages on the order of billions of years, as the detectable amounts of the radioactive atoms and their decayed daughter isotopes will be too small to measure within the uncertainty of the instruments.
One of the most widely used and well-known absolute dating techniques is carbon-14 (or radiocarbon) dating, which is used to date organic remains.
Archaeology is an important field of anthropology, which is the broad study of human culture and biology.
Archaeologists concentrate their studies on past societies and changes in those societies over extremely long periods of time.
The thing about geological time is that there is lots of it. There are lots of metaphors around - you'll probably have come across the one about imagining the history of the earth compressed into twenty-four hours, and humans not appearing until two minutes to midnight, or two seconds, or however long it is.
Personally, I don't think this properly conveys the sheer vastness of it all.
Absolute dating is the process of determining an age on a specified chronology in archaeology and geology.
Some scientists prefer the terms chronometric or calendar dating, as use of the word "absolute" implies an unwarranted certainty of accuracy.Archeology is the scientific study of past human culture and behavior, from the origins of humans to the present.Archaeology studies past human behavior through the examination of material remains of previous human societies.Now you'll need to imaginarily get up from your chair. This represents the earliest cave paintings, 34,000 years ago.Keep on walking until you've done six and a half kilometres, reeling out the string as you go.Now measure forty centimetres of string, and make another mark.