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The freshwater reservoir effect in radiocarbon dating
The freshwater reservoir effect can result in anomalously old radiocarbon ages of samples from lakes and rivers. This includes the bones of people whose subsistence was based on freshwater fish, and pottery in which fish was cooked. Water rich in dissolved ancient calcium carbonates, commonly known as hard water, is the most common reason for the freshwater reservoir effect. It is therefore also called hardwater effect. Although it has been known for more than 60 years, it is still lessdoi:10.1186/2050-7445-1-24 fatcat:nu2e2u7t6vh4tgnag4re2gnhpe