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지각 조각이 맨틀로 떨어지며 화산 폭발을 일으키고 섬들이 연쇄적으로 발생해 최초의 대륙이 생성됐을 것으로 추정된다...www.donga.com 2024-07-15
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해수면이 낮아지는 환경이었음이 밝혀졌다.특히, 백령도와 대청도, 소청도의 퇴적 이후 관입한 고철질 암석들로부터 이 지역이 과거(9억4000만 년...www.viva100.com 2023-12-05
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연구 결과 백령도와 대청도는 약 10억4000만년 전에서 9억5000만년 전 사이에 퇴적된 모래와 진흙이 굳어져 생성www.donga.com 2023-12-05
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