A CENTURY OF GEOLOGY LIBRARY USE: GATHERING EVIDENCE FROM THE STACKS

In the interest of planning for the long term disposition of the Geology library collection at Columbia University a usage study and inventory was designed in 2001. Criteria for retention were established following a pilot study which focused on materials in the field of petrology. Data collection for the entire library was implemented from 2002 to 2004. This paper will present some of the trends and patterns of collection use over the past century.