An incorrect version of Table 2 was printed. The results of probabilistic tests for reduction of interspecific SOL overlap are presented correctly in Table C of Hermoyian et al.'s data repository item (2002002). Table C is available upon request from Documents Secretary, GSA, P.O. Box 9140, Boulder, CO 80301-9140, email@example.com, or at http://www.geosociety.org/pubs/ft2002.htm. The results and discussion presented in the text were based on the correct numerical results and do not need to be modified.