Archaeological dating isotopes

For more on facial reconstruction, go to “Neolithic Face Time.” reports that more than 100 seeds thought to be 2,000 years old have been found in a brick tomb in the Inner Mongolia Autonomous Region of northern China.

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Excavation leader Steven Birch said it was clear the man was carefully buried, though the team members don’t know why he was brutally killed.

When it comes to dating archaeological samples, several timescale problems arise.

For example, Christian time counts the birth of Christ as the beginning, AD 1 (Anno Domini); everything that occurred before Christ is counted backwards from AD as BC (Before Christ).

Depletion in CAM plants vary between the values observed for C3 and C4 plants.

In addition, most fossil fuels originate from C3 biological material produced tens to hundreds of millions of years ago.

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