QUICK REFERENCE
GEOLOGIC AGE
Geologic Age: Identification Information
Originator: United States Geological Survey (USGS)
Date: June 29, 1999
Title: Geologic Map (geo_join)
Purpose: The purpose of
digitizing the geologic map was to allow us to have a geologic base on which we
drew the boundaries of the geologic provinces.
Abstract: The World Energy
Assessment created geologic maps of 7 regions. These regions were joined with
minimum edge matching or checking for feature description by the Global GIS
team. The user is warned there will be discrepancies on bordering features. The
regions are described in the Geologic Provinces of the World full metadata
files. Canada, Mexico and Central America, and the Europe tiles were screen
digitized by the Global GIS team. These were approximately located and should
be used as a geologic guide. The US and Alaskan Geologic Maps were kept as separate
layers to allow the use the apply their original legends. See the ArcView help to apply
these legends found in the the database\mapbase\i_lcov\geology directory. Please see the
"Full Metadata Link"
above for more information on errors for each area.
Access Constraints: none
Use Constraints: Portions of this
database covering coastline and country boundaries contain intellectual
property of Environmental Systems Research Institute, Inc. (ESRI), and are used
with their permission. End users are permitted to use these data sets for their
own internal use, including derivative work, but are prohibited from using and
redistributing these data individually or in a derivative work to third
parties.
Ordering
Instructions: none
Contact
Address: U.S. Geological Survey MS939, Box 25046
City: Denver
State
or Province: Colorado
Postal
Code: 80225-0046
Country:
USA
Online Linkage: www.ccgm.org
energy.cr.usgs.gov/energy/WorldEnergy/WEnergy.html
Entity and Attribute
Information (table heading explanations)
Shape: ArcView file type
Area (m^2): Area of polygon
Glg: Original Unit Class (abbreviated)
Desc: Description of “Glg” code: (file: glg_code.dbf)
Period: Major age type
(Quaternary, Tertiary,
Cretaceous ...)
Global GIS Note: These geologic layers (except the US and
Alaskan maps) were blindly merged
together. No edge matching was done and units were not check for consistency
between each region. If this is a concern, please visit the web page above to
access the original data in the original projection. We also added a field
called "Period" to help make a generalized legend using the major age
classifications (Quaternary, Tertiary, Cretaceous ...
1.
International
Geological Map of Africa at 1:5 M (copyright: CCGM/UNESCO, 1990)
2.
3.
Geological
Map of South and East Asia at 1:5 M (copyright: CCGM/UNESCO, 1990)
4.
5.
International
Geological Map of Europe and the Mediterranean Region at 1:5 M (copyright: CCGM/UNESCO/BGR, 1971)
6.
7.
Sheets 2, 3 (for Mexico and Canada) and 9 (Europe)
of the Geological Atlas of the World at 1:10 M (copyright:
CCGM/UNESCO, 1984).
Previously Published Permissions
Geology modified from "Geological Map of South and East
Asia at 1:5M Scale, Four Sheets." With permission from UNESCO / CCGM,
1997, Reference # UPO/D/A/97-002SC.
Geology modified from "Geologic map of South
America:Rio de Janiero, Brazil at 1:5M Scale." With permission from UNESCO
/ CCGM, 1997, Reference # UPO/D/A/97-002SC.
Geology modified from "International Geologic Map of
Africa at 1:5M Scale, Sheets 1, 2, 3, 5 and 6." With permission from
UNESCO / CCGM, 1997, Reference # UPO/D/A/97-002SC.
Geology modified from "Geological Map of South East
Asia at 1:5M Scale, Four Sheets." With permission from UNESCO / CCGM,
1997, Reference # UPO/D/A/97-002SC
Geology modified from "Bureau of Mineral Resources,
Geological Map of the World: Australia and Oceania at 1:5M Scale." With
permission from Australian Geological Survey Organization and Nuclear Sciences,
Limited, 1999.