Open-File Categories and 

Numbering Convention


Prefix
           Name
Description
OFBM
Bedrock Geologic Map
Bedrock geologic maps, many with a short text. Associated GIS datasets are packaged with these reports.
OFEG
Environmental Geology Report
Text, maps, databases, or other materials that focus on environmental interpretations of geologic information. Currently unused.
OFGA
Geologic Atlas
Text, maps, databases, or other materials that provide a more comprehensive interpretation of regional geology. Currently unused.
OFGG
General Geology Report
Text, maps, databases, or other materials that cover geologic topics of general interest.
OFMI
Miscellaneous Investigation
Text, maps, databases, or other materials that are prepared for various purposes, perhaps as the result of an extended service request or other short-term investigation.
OFMR
Mineral Resource Report
Text, maps, databases, or other materials relating to fuel or nonfuel mineral resources.
OFOG
Oil and Gas Report
Text, maps, databases, or other materials relating to petroleum.
OFSM
Surficial Geologic Map
Surficial geologic maps, many with a short text. Associated GIS datasets are packaged with these reports.
OFWR
Water Resource Report
Text, maps, databases, and other materials with a primary focus on water resources. Currently unused.

Report numbers follow the prefix, for example, OFSM 04–02.1. The first number before the dash represents the year of release, the two numbers after the dash designate the sequence of the report within the year of publication, and the number after the decimal point indicates the version. A zero (0) after the decimal point would indicate the report has had no revisions. In our example, “04” indicates the open-file surficial geologic map was published in 2004, “02” indicates that it is the second report published in the OFSM series that year, and “1” indicates that the report has undergone one revision.