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Compiled by J.D. Walker, J.W. Geissman,
             S.A. Bowring, and L.E. Babcock, 2018

             Use this colorful, poster-size
             version of GSA’s Geologic Time
             Scale (v. 5.0) to decorate your office
             or classroom.

             GTSPOS  |  20" × 26"  |  $9.95









                                                                       FULL-COLOR POSTER


                                             BUY ONLINE  }  https://rock.geosociety.org/store/


                                             toll-free 1.888.443.4472  |  +1.303.357.1000, option 3  |  gsaservice@geosociety.org


                                                                                       www.geosociety.org/gsatoday  33
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