Geologist Mike Barnhardt and drilling staff examine a core taken
during drilling in the Zurich quadrangle.
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Sallie Greenberg explains the properties of dry ice during the
2006 ISGS Open House.
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Bob Vaiden and Sallie Greenberg conduct a Near and Far Science
in Illinois workshop for teachers.
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Dan Adomaitis operates a GeoProve on Michigan Avenue in downtown
Chicago, Illinois
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Geologists explore Illinois Caverns, Monroe County, about 35
miles south of St. Louis.
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