Thermoluminescence dating archaeology Cam2 4at

Many of the objects left behind by past human societies are not present in the archaeological record because they have disintegrated over time.

The material remains that still exist after hundreds, thousands, or millions of years have survived because of favorable preservation conditions in the soil or atmosphere.

thermoluminescence dating archaeology-11

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.

On rare occasions, however, delicate objects have been preserved.

For example, fabrics and flowers were found in the celebrated tomb of Tutankhamun, an Egyptian pharaoh who was buried in 1323 BC.

Dozens of archaeological sites throughout Asia and Europe show how people migrated from Africa and settled these two continents during the last Ice Age (100,000 to 15,000 years ago).

Archaeological studies have also provided much information about the people who first arrived in the Americas over 12,000 years ago.

The potassium-argon dating method has been used to measure a wide variety of ages.

The potassium-argon age of some meteorites is as old as 4,500,000,000 years, and volcanic rocks as young as 20,000 years old have been measured by this method.

For the most part, the only things that survive are durable items such as potsherds (small fragments of pottery), tools or buildings of stone, bones, and teeth (which survive because they are covered with hard enamel).

Because many items disintegrate over time, archaeologists get an incomplete view of the past that they must fill in with other kinds of information and educated reasoning.

Archaeologists have documented that the development of agriculture took place about 10,000 years ago.

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