Hello All, I think Zach has a good idea, but why not take it one step further, and start up the GNIP in the states? We all could make measurements, and report them to a single data base. Just an idea. -Bill -- William Anderson Assistant Professor Geology Department and Southeast Environmental Research Center Florida International University Mailing address: Geology Dept., PC 344 FIU 11200 S.W. 8th Street Miami, FL 33199 USA office: 305 348 2693, sec. 348 3572 SERC stable isotope lab: 305 348 3044 fax: 305 348 3877 email: [log in to unmask]