Bone age dating archaeology

Green plants absorb the carbon dioxide, so the population of carbon-14 molecules is continually replenished until the plant dies.Carbon-14 is also passed onto the animals that eat those plants.After death the amount of carbon-14 in the organic specimen decreases very regularly as the molecules decay.Carbon-14 has a half-life of 5,730 ± 40 years, meaning that every 5,700 years or so the object loses half its carbon-14.One of the arrows turned out to be from another reindeer hunt, but the hunt had taken place 5,400 years ago.This is the oldest archaeological find from mountain snowsfields in Scandinavia.On the last Friday in August, Tord Bretten stopped by the museum with his first find of the season, an arrowhead made from bone.

Bretten got interested in finding artefacts in snowdrifts in Oppdal when he was 17 and read an archaeological thesis about the topic.But in the last decade the number of finds has nearly skyrocketed, with 2011 as a peak year with 42 discoveries in the summer season.“Findings of this magnitude are enough for a whole generation and we received all of them in a single season,” says Callanan.“Each and every one of them is invaluable to us.”The NTNU University Museum now has 250 such artefacts in its collection. This year’s season has just begun and seven discoveries have been made so far.This arrow, and a slightly younger one dating back 5,200 years, are among finds recently discussed in the publication Antiquity by archaeologist Martin Callanan of the Norwegian University of Science and Technology (NTNU).Discoveries of arrowheads, arrow shafts and fragments of bows and various tools have been made before in snowdrift glaciers in the Oppdal region.