Correlogram question

Hi,

I am trying to compute a spatial correlogram for a single variable using 
great-circle distances.  Does anybody know of a function in R that can 
complete this analysis?

Thanks a lot for any information you might have,

Laura

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Laura I. Gonzalez-Guzman
University of Texas at Austin
Integrative Biology
1 University Station A6700
Austin, TX 78712-0253
Phone: (512) 471-5368
Fax: (512) 232-9529