Geological Survey Program

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Homestake Core Archive • The rock core was donated to the State of South Dakota by Homestake Mining Company as part of the mine transfer. • The Geological Survey Program inventoried more than 39,760 boxes of core that comprise the majority of the Homestake Core Archive. • The archive represents approximately 1,738 drill holes. • Information about each box of core had to be recovered from various files. • A searchable database for the core was developed for use by scientists and DUSEL personnel.
Examples of some core in the Homestake Core Archive. Conservatively estimated to be worth about 19.8 million dollars. Scientists use the core to understand subsurface geology and to design experiments.
Page 1 and 2: Derric Iles, CPG State Geologist -
Page 3 and 4: Examples of the value and uses of g
Page 5 and 6: Example of detail on the state geol
Page 7 and 8: Draft geologic map of the Lemmon 1
Page 9 and 10: Brookings County Surface Geology 1:
Page 11 and 12: Geologic Mapping 1:24,000 scale 7.5
Page 13 and 14: Available online in Adobe PDF or sh
Page 15: 22,747 test holes and wells drilled
Page 18 and 19: A product made possible by the dril
Page 20 and 21: Assistance is provided to DENR’s
Page 22 and 23: Aquifers and Monitoring Sites in th
Page 24 and 25: Aquifer Delineation Mapping of the
Page 26 and 27: Status of “Aquifer Materials” M
Page 28 and 29: Example of map detail Depth categor
Page 30 and 31: Bedrock map of eastern South Dakota
Page 34: Questions

Geological Survey Program

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