Physics
Scientific paper
Dec 1967
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967gecoa..31.2353b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 31, Issue 12, pp.2353-2359
Physics
3
Scientific paper
Statistical reassessment of the Rb-Sr data of and (1964) for the Middle Devonian Hamilton Group, New York and Pennsylvania, shows that the age can be more adequately represented by two parallel isochrons instead of the conventional one. Pooling of these two isochrons results in an apparent age of 384 ± 9 million yr for the Hamilton Group (using Rb 87 = 1.47 × 10 -11 / yr ), with the possibility that this value could be reduced to 377 ± 11 million yr . These estimates fall within the presently suggested limits for the age of the Devonian. On the basis of these results there is no evidence to suggest that in general the application of total rock Rb-Sr age measurement techniques to argillaceous sediments yields results in excess of the true age of sedimentation.
Bofinger V. M.
Compston William
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