Abstract
Fossil intertidal barnacles are excellent indicators of recnet sea-level stands, even those of short duration, especially on elevated rocky coasts. This paper deals with problems related to finding, sampling, cleaning, dating and interpreting the altimetric significance of fossil barnacle samples collected in a living position. The distribution and ecology of Octomeris sulcata, Tetraclitella and Chthamalus are described. Examples are provided for the reconstruction of relative sea-level variations due to sudden uplift movements (Okinawa and Toku Islands), to gradual uplift movements (Kume Island) and to a slight relative emergence since ca. 600 yr. B.P. that has been reported for the first time in several Ryukyu Islands.
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