This index was created to assist in locating detailed geologic maps of Utah that are distributed among the map and monographic series published by the United States Geological Survey (USGS) and the Utah Geological Survey (UGS). It correlates the geologic maps to the USGS 7.5 and 15 minute quadrangles. By finding the quadrangle name in the index, one can easily determine the existence of geologic maps covering part or all of the quadrangle. Only maps having scales of 2 miles to the inch or approx. 1:125,000 and larger are included in the index. 

The index is alphabetical by quadrangle name. Information provided for each quadrangle includes: the scale rounded off to the nearest thousand, the best fit description of area in quadrangle mapped (coverage), subject if other than general geology, and the source, i.e. the abbreviated USGS or UGS series name. "See" references to 7.5 minute quadrangles are provided from 15 minute quadrangle names and obsolete 7.5 minute quadrangle names.

If you do not know the quadrangle name(s) for your area of interest, find it by using this link to the Utah index to topographic and other map coverage. Another version of it is published and freely distributed by the USGS at:

US Geological Survey (USGS) Map Distribution
USGS Map Sales (USDI)
Federal Center, Building 810 USDOI
PO Box 25286
Denver, CO 80225

or phone:

(303) 236-7477 or (888) 275-8747 or Fax: (303) 202-4693, also see http://www.usgs.gov

The quadrangle name can also be determined through the internet using the USGS Geographic Names Information System (GNIS) at: http://geonames.usgs.gov/pls/gnis/web_query.gnis_web_query_form. Simply search a feature name in the GNIS and it will provide the 7.5 minute quadrangle name.

Below is a legend to the abbreviations used throughout this index, and diagrams depicting the meaning of coverage notation.

CI

Coal Investigations

CIu

Coal Investigations (unnumbered)

GF

Geologic Folio

GP

Geophysical Investigations

GQ

Geologic Quadrangle

I

Miscellaneous Geologic Investigations

MF 

Mineral Investigations Field Studies

OM

Oil and Gas Map

OC

Oil and Gas Investigations Chart

B

Bulletin

C

Circular

P

Professional Paper

W

Water-supply Paper

E

East

N

North

NE

northeast

NW

northwest

S

South

SE

southeast

SW 

southwest

W

West