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NUCLEAR MAGNETIC RESONANCE CHARACTERIZATION OF CRETACEOUS AMBER
Author(s) -
LAMBERT J. B.,
JOHNSON S. C.,
POINAR G. O.
Publication year - 1996
Publication title -
archaeometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 67
eISSN - 1475-4754
pISSN - 0003-813X
DOI - 10.1111/j.1475-4754.1996.tb00780.x
Subject(s) - cretaceous , geology , paleontology , maturity (psychological) , spectral line , paleomagnetism , mineralogy , physics , astronomy , psychology , developmental psychology
Carbon‐13 nuclear magnetic resonance spectra have been examined under high resolution conditions for 31 samples of fossil resin that have been dated to the Cretaceous period. Samples from Alaska, Canada, parts of the United States, Greenland, France, Switzerland, Lebanon, Jordan, and Israel have very similar spectra, consistent with a common, geographically dispersed palaeobotanical source. Samples within this large group exhibit a variation in spectral linewidth that is consistent with differences in sample age or maturity. A single Triassic sample from Bavaria shows the same spectral patterns but greater linewidths, indicating that it probably had a similar palaeobotanical source.