Geologic-GIS Map of Bering Land Bridge National Preserve and Vicinity, Alaska

The Geologic-GIS Map of Bering Land Bridge National Preserve and Vicinity, Alaska, adapted from a U.S. Geological Survey Open-File Report map by Till, A.B., Dumoulin,...阿拉斯加州白令陆桥国家保护区及周边区域地质-GIS（Geologic-GIS）地图，由Till, A.B.、Dumoulin等根据美国地质调查局（U.S. Geological Survey）公开文件报告（Open-File Report）中的原地图改编而成。