Twelve samples such as charcoal, wood and pot-shards were collected from Pungnap-dong site(inner side of earthen castle and dwelling site), Songpagu, Seoul. Concentrations of radiocarbon contained in charcoal and wood samples were measured and compare...
Twelve samples such as charcoal, wood and pot-shards were collected from Pungnap-dong site(inner side of earthen castle and dwelling site), Songpagu, Seoul. Concentrations of radiocarbon contained in charcoal and wood samples were measured and compared with that of international modern standard(SRM4990C, NIST) sample and calculated the radiocarbon ages. For pot-shards, fine grain samples(2~10㎛) were extracted from fresh body and measured their thermoluminescence and converted into radiation dose, potassium concentrations and water contents respectively. Thermoluminescence ages of pot-shards were calculated by dividing palaeodose by annual dose.
Radiocarbon ages of four samples were calculated in the range of BC I century and AD 3 century, which were from Poongnap earthen castle(wall, mud and cornerstone) and one pot-shard from the same site was found AD 1~2 century by thermoluminescence measurement, which means that the absolute ages are well accorded with each other within the margin of error. Such a result is considered helpful in estimating the age during which the earthen castle was built. And six charcoal samples of dwelling sites were found some differences in radiocarbon ages but considered around era.