Stratigraphy and Relative Geochronology
نویسنده
چکیده
Stratigraphy is the science that studies the strata, or beds, of (mainly) sedimentary rocks in order to extract from them the history of the earth’s surface. By grouping the bed successions in stratigraphic units and by studying their geometrical relationships with some simple rules, it creates the fundamental temporal relative framework necessary to understand the origin of the rock units themselves. Several sub-disciplines or methodological approaches (especially biostratigraphy and paleontology) cooperate in the fundamental task of Stratigraphy, which is the correlation, that is, the recognition of the time equivalence of two different sedimentary successions. In this way a standard chronostratigraphic table, or geologic timescale, has been constructed whose divisions are continuously calibrated in terms of absolute age.
منابع مشابه
Time in the Geological past of Earth
1. Geological Time: A Summary 2. Reconstruction and Relative Dating of Earth History 2.1. Early Ideas and Basic Principles 2.2. Uniformitarianism and Catastrophism 2.3. Geological Catastrophes and Events: Particular Historical Geological Phenomena 2.4. Rates of Geological Processes in Terms of Human Timescales 2.4.1. Earth Crust Movements 2.4.2. Plutonic and Volcanic Processes 2.4.3. Weathering...
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