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Some biostratigraphical concepts

Curt Teichert
Some biostratigraphical concepts
Bulletin of the Geological Society of America (January 1958) 69 (1): 99-119


Time can be measured by observing unidirectional and nonreversible processes, or processes that proceed with a fixed periodicity. Geologic time is measured by observations of rock features that give evidence of previous existence of unidirectional or periodically repeated processes. Periodically recurrent processes do not provide world-wide time standards. The only natural processes that are of a unidirectional and nonreversible nature and that leave universally occurring testimony in the rocks are radioactive decay and evolution of life. The study of past life forms and their distribution in the rocks (paleontology and biostratigraphy) provides a reference system for determining the order of succession of geologic events from the Cambrian to the Recent. Radioactive dating supplies an approximative reference grid of dates in terms of absolute time.

ISSN: 1050-9747
Serial Title: Bulletin of the Geological Society of America
Serial Volume: 69
Serial Issue: 1
Title: Some biostratigraphical concepts
Author(s): Teichert, Curt
Pages: 99-119
Published: 195801
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1959-030414
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1959
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