Geologic database for digital geology of California, Nevada, and Utah?An application of the North American Data Model

The USGS is creating an integrated national database for digital state geologic
maps that includes stratigraphic, age, and lithologic information. The majority
of the conterminous 48 states have digital geologic base maps available, often
at scales of 1:500,000. This product is a prototype, and is intended to
demonstrate the types of derivative maps that will be possible with the
national integrated database. This database permits the creation of a number of
types of maps via simple or sophisticated queries, maps that may be useful in a
number of areas, including mineral-resource assessment, environmental
assessment, and regional tectonic evolution.

This database is distributed with three main parts: a Microsoft Access 2000
database containing geologic map attribute data, an Arc/Info (Environmental
Systems Research Institute, Redlands, California) Export format file containing
points representing designation of stratigraphic regions for the Geologic Map
of Utah, and an ArcView 3.2 (Environmental Systems Research Institute,
Redlands, California) project containing scripts and dialogs for performing a
series of generalization and mineral resource queries.

[Summary provided by the USGS.]