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Geochronology Working Group at Vienna University
Uses radiometric dating and classical geochronological methods to constrain the timing of geological processes, primarily in the Eastern Alps, the Carpathian - Pannonian region and adjoining area, and the Bohemian Massif. Includes descriptions of several |
Geologic Time
USGS on-line publication about the relative and radiometric geologic time scales, age of the earth, index fossils, and related topics. |
Geological Time
Lecture notes on different methods of measuring geologic time. |
Institute for Precambrian Geology and Geochronology
Russian institute for the study of the Precambrian, with English sections. |
Synoptic Time Table of Earth History
Chart correlates geologic, paleontologic, and absolute time scales, also including glaciations. |
Web Time Machine
Geologic time scale with links for each time interval. |
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