• Proceedings of the Korean Statistical Society Conference
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• 2003.10a
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• pp.47-52
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• 2003

삼국사기 등에 기록되어 있는 천문기록들이 왜곡된 역사관에 의해 그 기록의 정확성이나 독창성에 의문을 갖게 하였다. 하지만 일식기록의 관측시점에 대한 최근의 연구결과는 오히려 우리의 고천문기록이 중국 문헌상에 나타나는 기록보다도 더 정확한 것으로 판명되고 있다. 따라서 중국측 사료와의 비교를 통해 고천문기록의 정확성과 독창적으로 일관되게 천문기록을 남겼음을 본 논문에서 밝혀 보고자 하였다.

• Economic and Environmental Geology
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• v.45 no.5
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• pp.565-578
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• 2012

Sedimentary facies of the Middle to Upper Cambrian Sesong Formation, Taebacksan Basin, are analyzed using detailed field mapping and stratigraphic section measuring. As a result, five sedimentary facies are recognized in the formation, which include lime nodule bearing shale facies, anastomosing wackestone-packstone facies, well-laminated siltstone facies, fine to medium sandstone facies and lime pebble conglomerate facies. Together with sedimentary facies analysis, study on vertical facies variation indicates that the Sesong Formation was deposited in an outer to inner shelf during relative sea-level fall. Especially, shallow marine aspects of the upper part of the Sesong Formation including 10-m-thick, fine to medium-grained sandstones appear to be very similar with the shallow marine strata accumulated during the Steptoean Stage (Dunderbergia) in Laurentia. These lithofacies comparisons of coeval strata between two continents suggest that sedimentation in the Sesong Formation reflects the influence of global sea-level fall occurred during the late Middle Cambrian to early Late Cambrian. As well, a stratigraphic discontinuity surface that may have sequence stratigraphic significance is recognized within the shallow marine sandstone beds of the uppermost Sesong Formation. This stratigraphic discontinuity surface may correspond to the Sauk II-III sequence boundary in Laurentia. Therefore, results delineated in this study will use a new stratigraphic paradigm for regional correlation of the Middle to Late Cambrian strata (e.g., the Sesong Formation) in the Taebacksan Basin, and will provide very useful information on intercontinental stratigraphic correlation in the future.