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Yu Y.,Chungnam National University | Doh S.-J.,Korea University | Kim W.,Korea University | Park Y.-H.,Kangwon National University | And 11 more authors.
Earth and Planetary Science Letters

An archeomagnetic paleosecular variation (PSV) was first defined in Korea using baked materials collected from 26 kilns or hearths with ages ranging from ~ 1100 BC to AD 1790. Variations of geomagnetic declination and inclination from the Korean peninsula are distinctively different from the prediction of a global model (CALS3k.3 or CALS7K.2) for the past 3500. yr. In particular, a distinctive offset in magnitude and phase is noticeable between the observations and predictions at ~ 745 BC, ~ AD 300, and ~ AD 1400-1700. A bi-plot of magnetic declination versus inclination displays three cusps at the corresponding time intervals. These time intervals are nearly identical to or at least overlap with three of the four potential archeomagnetic jerks suggested by Gallet et al. (2003) from the European archeomagnetic data. A comparison of the PSV curves for neighboring countries/regions revealed that European archeomagnetic jerks at ~ 800 BC, ~ AD 200, ~ AD 800, and ~ AD 1400 were all preserved in East Asia, suggesting that the archeomagnetic jerks were global (or at least northern hemispheric) features. © 2010 Elsevier B.V. Source

Seo M.,Dankook University | Oh C.S.,Dankook University | Oh C.S.,Seoul National University | Chai J.Y.,Dankook University | And 14 more authors.
Journal of Parasitology

The present study showed that ancient parasite eggs, not commonly present in soil samples from medieval Korean tombs, have been found in a very limited number of cases that satisfy certain archaeological requirements. In our paleo-parasitological examination of soil samples from medieval tombs encapsulated by a lime soil mixture barrier (LSMB), parasite eggs were more commonly detected in tombs that contained remains with clothes, hair, or brain tissue, though samples from not all such tombs contained eggs. Nonetheless, there was a close correlation between the preservation of certain types of cultural or human remains and the presence of ancient parasite eggs within medieval Korean LSMB tombs. Such remains, therefore, could be regarded as a strong predictor of well-preserved ancient parasite eggs in soil samples from LSMB tombs. © 2010 American Society of Parasitologists. Source

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