Integrating 3-D Facies Analysis of Glacial Aquifer Systems with Ground-water Flow Models: Examples from New England and the Gr

Modern ground-water flow models, geotechnical studies, and science-based land-use planning require knowledge of the distribution of surficial earth materials from land surface to the top of bedrock (e.g., Masterson and others, 1997a,). To be useful, modern geologic maps must portray such information three dimensionally in a way that is consistent with the regional stratigraphic framework, geotechnical classifications, and the most recent understanding of geologic depositional processes (Masterson and others, 1997b, Central Great Lakes Geologic Mapping Coalition, 1999). The evolution of 3-D geologic maps of glacial meltwater deposits demonstrates new 3-D mapping and analytic techniques now available for these studies in the desktop computer environment.