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Terminologies and classifications
Collections of terms often including definitions or scope notes, with some stated relationships among terms
Subtopics:
Geologic time scales (7 items)


Results 1 - 10 of 25 listed by similarity [list alphabetically]
Improving access to metadata using keywords from controlled vocabularies [More info]
Description of the use of Place Keyword Assistant, a software tool, for tagging metadata with geographic names from standardized lists or controlled vocabularies. Includes instructions on use and downloading software files.
Biocomplexity Thesaurus [More info]
Browsable online access to the CSA/NBII Biocomplexity Thesaurus developed in 2002-2003 through a partnership between the NBII and CSA as a merger of five thesauri.
Classification of natural ponds and lakes in the glaciated prairie region [More info]
Presents a wetland classification system that reflects seasonal, regional, and local variations in the environment.
Classification of wetlands and deepwater habitats of the United States [More info]
Detailed publication on the classification system for an inventory of wetlands and deepwater habitats of the United States used to describe ecological taxa and arrange them in a system useful to resource managers.
Coal Resource Classification System of the U.S. Bureau of Mines and U.S. Geological Survey [More info]
A report published jointly by the U.S. Bureau of Mines and U.S. Geological Survey giving definitions of coal resource classification terms.
Coal Resource Classification System of the U.S. Geological Survey [More info]
The classification system by which coal is classified into resource/reserve base/reserve categories on the basis of the geologic assurance of the existence of those categories and on the economic feasibility of their recovery.
Compilation of various geologic time scales [More info]
Preliminary report comparing various geologic time scales. Text is HTML or plain text format, and colored compilation chart in Excel format.
PDF Divisions of Geologic Time - Major Chronostratigraphic and Geochronologic Units [More info]
A summary of the divisions of geologic time intended to provide a consistent time scale to be used in communicating ages of geologic units in the United States.
Earthquake glossary [More info]
Dictionary of terms associated with earthquakes with simple definitions and photographs especially suited for students.
Fossils, rocks, and time [More info]
Booklet describes how paleontologists use the identification of fossils to recognize rocks of the same or different ages.
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