However its application has caused extreme confusion and misunderstanding of the archaeological record.Knowing the limitations of this dating method can help avoid colossal archaeological misinterpretations that would otherwise distort history.During these excavations he discovered an ancient pottery sherd which held remnants of burnt food. I had found the pot by the river, so the food crust could possibly consist of fish.Hartz, an expert in the Stone Age of northern Europe, sent the pot sherd away for carbon-14 dating and was amazed when the laboratory came back with a date of 5200 BC. This pottery was many hundreds of years older than all the pottery that was previously found in Northern Germany. I remembered that there were dating problems with freshwater fish, which could give misleading ages,“ explained Hartz.These atoms rapidly decay into radiocarbon-dioxide and along with ordinary CO2 are absorbed by living plants.As plants enter the human and animal food chains the C14 dioxide enters their living tissue.Dedicated at the University of Chicago on October 10, 2016.In 1946, Willard Libby proposed an innovative method for dating organic materials by measuring their content of carbon-14, a newly discovered radioactive isotope of carbon.
This is known as the “reservoir effect” because the fish’s carbon actually comes from another “reservoir” than the carbon in terrestrial animals from the surrounding area.
Known as radiocarbon dating, this method provides objective age estimates for carbon-based objects that originated from living organisms.
The “radiocarbon revolution” made possible by Libby’s discovery greatly benefitted the fields of archaeology and geology by allowing practitioners to develop more precise historical chronologies across geography and cultures.
Hard water contains less Carbon-14 than the atmosphere, because dissolved carbonates are Carbon-14 free.
A fish caught in hard water has thus a higher Carbon-14 age than contemporaneous terrestrial samples.