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The Geological Society of America publishes a wide range of peer-reviewed scholarly works in the form of journals, books, field guides, maps, and charts. The GSA Bookstore also carries educational materials, plus a variety of field tools.
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| EarthCache Master Silver GeoCoin |
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 | | | Member | Non-Member | | | $9.99 | $9.99 | | |  |
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| | Year Published: | 2009 | | Product Code: | ECSLCOIN | | This geocoin represents the EarthCache Masters Silver Level. It has the EarthCache Master logo on one side and a geologic cartoon of sedimentary deposition on the reverse. The coin is fully trackable through www.geocaching.com/track. |
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