Jojo, my dear alien, you cannot do carbon dating of anything past ~1950 because there is a lot of contamination due C13 from nuclear explosions.
The mammoth ages seem OK, it is usual to find parts of different animals together. You don't take the age of non living things with carbon dating. Carbon dating don't go to 300ka, there isn't calibration for that. An age like this mean you have just measured background contamination. Old Amerindian remains, specially during the 80's, were involved in many controversies, since the mainstream academic view was that the Clovis culture had to be the oldest, and any pre Clovis was considered outright bullshit. So, there was a lot of nitpicking to lower the age of these outliers. -- Daniel Rocha - RJ danieldi...@gmail.com
