This site from The New York State Museum features a compilation of regional and statewide geology/hydrology GIS datasets that are available in ArcInfo and ArcView formats. Datasets are separated into four categories: statewide - coverage for the whole state (may be comprised of several datasets), regional based data - coverage for a portion of the state, county based data - coverage for an entire county, and quad based data - coverage for an entire 7.5' quadrangle.
Subject: Geoscience:Geology, Hydrology:Surface Water, Geography:Geospatial Resource Type: Scientific Resources:Collection, Datasets and Tools:Datasets Special Interest: GIS Topics: Hydrosphere/Cryosphere:Surface Water, Solid Earth, Earth surface Data Source: Observational Data Data Derived: Data Derived Science Background Required: Basic scientific background required