General Chronological Criteria

  • J. P. Bard
Part of the Petrology and Structural Geology book series (PESG, volume 1)


It is common practice to assume that in igneous or metamorphic rocks, a given mineral 1 is older than some mineral 2 if 1 is either partly or completely included in 2 (Fig. 3.1A). The relative ages of 2 and 1 can usually be determined by general petrogenetic analysis and by studying the local geological context. In some cases, the form and distribution of 1 and 2 can give an idea of the time lapse between the formation of the first and that of the second mineral.


Metamorphic Rock Polycrystalline Aggregate Native Crystal Geometrical Lattice Prefer Nucleation Site 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1986

Authors and Affiliations

  • J. P. Bard
    • 1
  1. 1.Université des Sciences et Techniques du LanguedocMontpellier IIFrance

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