Open AccessSlow growth rate of a deep-sea clam determined by 228Ra chronology.
Author(s) -
Karl K. Turekian,
J. Kirk Cochran,
D.P. Kharkar,
Robert M. Cerrato,
J. Rimas Vaišnys,
Howard L. Sanders,
J. Frederick Grassle,
J. A. Allen
Publication year - 1975
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.72.7.2829
Subject(s) - chronology , population , deep sea , fraction (chemistry) , geology , oceanography , biology , mineralogy , paleontology , chemistry , chromatography , demography , sociology
The age of a deep-sea clam, Tindaria callistiformis, from 3803 m depth has been determined by 228Ra (6.7 year half-life) chronology of separated size fractions of a captured population. A length of 8.4 mm is attained in about 100 years. Shells of this size fraction show about 100 regularly spaced bands, indicating that the growth feature may be an annual one.