보은탄전 상부 고생대층에서 발견된 방추충

Fusulinids from the Upper Paleozoic Strata of Boeun Coalfield, Korea

  • 발행 : 2000.06.28

초록

충북 보은군 임곡리의 시추 표품(90-B-1)에서 Pseudoschwagerina paraborealis 와 Quasifusulina sp.를 기재하였으며, 이에 근거하여 Pseudoschwagerina대를 설정하였다. Pseudoschwagerina paraborealis는 영월 탄전의 밤치층에서 보고되었고 유라시아 대륙의 아셀리안과 사크마리안 지층에서 다수 기재된 바 있다. 보은 탄전에서 Pseudoschwagerina paraborealis 가 산출되는 것은 영월탄전의 밤치층과 대비되는 지층이 보은 탄전에서도 존재한다는 증거이다. 이 방추충과 함께 같은 층준에서 Quasifusulina sp.가 산출된다. 보은 탄전에서 전기 고생대의 방추충 종을 동정하여 발표하는 것은 이번이 처음이다.

Two species of fusulinids, viz., Pseudoschwagerina paraborealis and Quasifusulina sp. are described from the limestone core sample(90-B-1). The core sample was obtained from Imgokri, Boeungun, Chungcheongbukdo, Korea. Recognition of Pseudoschwagerina helped the authors to establish the Pseudoschwagerina Zone. Pseudoschwagerina paraborealis has been reported from the Bamchi Formation of Yeongweol coalfield in Korea and also from the Asselian and Sakmarian strata in Eurasia. The occurrence of Pseudoschwagerina paraborealis in the Boeun coalfield demonstrates the existence of the early Permian strata that are equivalent to the Bamchi Formation of Yeongweol coalfield. The authors report Quasifusulina sp. which indicates the early Permian period as well as Pseudoschwagerina paraborealis. It is the first time that the species of early Permian fusulinids are identified from the Boeun coalfield.

키워드

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