Geological Survey Program

McCracken Core Library and Research Center

Please Note: The McCracken Core Library and Research Center open by appointment.  Please send email to schedule a time to visit the facility.  If you have questions, please email or call 573-368-2143.

Image--McCracken Core LibraryThe division manages the McCracken Core Library and Research Center, which is a repository for more than two million linear feet of exploration rock cores that have been donated to the state.  The 21,000 square-foot facility is named in honor of geologists Earl and Mary McCracken, whose service to the geological survey spanned more than three decades.  Study and examination room facilities were made possible through donated funds in the memory of Clark. S. Rhoden.  Mr. Rhoden donated some of his core that was used when exploring and drilling for oil in Missouri.  His North and South Rhoden leases produced more than $5.7 million dollars of oil between 1980 and 1987.

Core is cylinder-shaped segment of rock obtained by using a hollow-core drill.  Drilling may be to depths of 1,000 feet or more.  Most of the core is 1 3/8 inches in diameter and stored in 2-foot sections.

Images--Core Samples



Core research and examination preserves geological history, leads to a better understanding of Missouri geology and hydrology, and yields data useful in solving environmental, industrial and engineering problems.  Core available for study comes from landfills, quarries and hazardous waste sites, as well as highway department construction, and oil, gas and mineral exploration drilling in Missouri.

The McCracken Core Library and Research Center is one of the largest such collections in the nation and is open to the public, by appointment.

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