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Boundaries and Tags for Major Geologic Units in the United States
Entry ID: UTC_majorgeologicunits

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Abstract: This data set contains boundaries and tags for major geologic units in the
conterminous United States. In addition to the polygons representing the areal
extent of geologic units, it identifies boundaries of metamorphic provinces,
major faults, calderas, impact structures, and the limits of continental
glaciation. The data depict the geology of the bedrock that lies at or near
the land surface, ... View entire text
Related URL
Description: Location from which the map may be downloaded in PDF or archives
of ArcInfo files.
Geographic Coverage
Spatial coordinates   
  N: 44.77   S: 30.83   E: -72.72   W: -122.21

Data Set Citation
Dataset Originator/Creator: John C. Reed, Jr.,Charles A. Bush
Dataset Title: Boundaries and Tags for Major Geologic Units in the United States
Dataset Release Date: 2001
Dataset Release Place: Denver, Colorado
Dataset Publisher: U.S. Geological Survey
Data Presentation Form: map
Online Resource:
Temporal Coverage
Start Date: 1998-03-01
Stop Date: 1999-06-01
Quality The line attributes were manually checked by assigning unique line types to the
values and then plotting the data. The plots were then compared to the source.

The polygon attributes were checked by visually comparing the final colored
plots to maps at various larger scales. Polygon and node topology are present.
... View entire text
Access Constraints None
Use Constraints None. Acknowledgment of the National Atlas of the United States of America and
(or) the U.S. Geological Survey would be appreciated in products derived from
these data.
Data Set Progress
Data Center
Central Region, Publications, Geology Division, U.S. Geological Survey, U.S. Department of the Interior Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 303-236-0953
Fax: 303-236-5349
Email: gellis at
Contact Address:
US Geological Survey
Geologic Division, Central Region
Box 25046, Mail Stop 980
City: Denver
Province or State: CO
Postal Code: 80225-0046
Country: USA
Distribution Media: Online
Fees: No fees
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2003-03-26
Last DIF Revision Date: 2017-08-23
Future DIF Review Date: 2004-03-26