Acknowledgement
이 연구를 위해 많은 도움을 준 국립문화재연구원의 김태형 박사, 나무고사리 화석 표본을 제공해 주신 동아대학교 박인석 교수, 경북대학교 고생물학연구실 및 칠곡군 관계자와 주민분들께 감사드리며, 논문의 심사과정에서 세심한 검토와 지적으로 논문의 질을 높여주신 세분의 심사위원님께 감사드린다. 이 논문은 문화재청 국립문화재연구원의 지질유산 보존관리를 위한 기초조사 및 활용 연구(NRICH-2405-A71F-1)의 일환으로 수행되었으며, 2008~2011년 실시한 「천연기념물 화석산지 모니터링조사 보고서」 의 내용 중 일부를 발췌·수정하였다.
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