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Core Repository for Earth Sciences (CORES)

Core Repository for Earth Sciences (CORES)

The joint CGS/Mines Core Repository for Earth Science (CORES) showcases a diverse array of rock cores and cuttings, primarily from across Colorado but also including materials from other regions. These samples are invaluable for understanding subsurface geologic conditions, including energy and mineral resources, groundwater systems, and fluid migration pathways. Many cores have associated high-resolution images that allow for remote viewing and analysis. You can browse the map or search the repository by location, formation, or well name to find samples relevant to your area of interest.

This repository is a collaborative effort between the Colorado Geological Survey and the Colorado School of Mines, with funding support from CGS, the U.S. Geological Survey, and Robert J. Weimer.

Special thanks to Matthew “Josh” Shaw, who cataloged and imaged the cores, and to Stephen Sonnenberg for his technical consultation.

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Cores Data

Table of CORES Well Information
Well Name Company Basin Field Location Attributes View more information about
Moran #2

49-005-05473

 Sinclair PRB Halverson campbell, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Moran #2
Tanner #19-2 (1902)

25-075-21652-00-00

 Sam Gary PRB Bell Creek Powder River, MT-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Tanner #19-2 (1902)
Fed. Culver 7-9 (Unit 5709)

25-075-21522-00-00

 Sam Gary PRB Bell Creek Powder River, MT-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Fed. Culver 7-9 (Unit 5709)
USA #42-28-43

33-053-00948-00-00

 Shell Oil Williston Mondak McKenzie, ND-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on USA #42-28-43
Beltz 13-11

25-075-21548-00-00

 Sam Gary PRB Bell Creek Powder River, MT-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Beltz 13-11
#1 Federal 311-Campbell

49-005-05448

 Sinclair PRB Timber Creek Campbell, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on #1 Federal 311-Campbell
Dzuris #11-14

05-041-06007

 Shell Oil Denver Wildcat El Paso, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Dzuris #11-14
Tanner 5-8 (Unit 508)

25-075-21565-00-00

 Sam Gary PRB Bell Creek Powder River, MT-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Tanner 5-8 (Unit 508)
E. Salt Creek A-10

49-025-09206

 Sinclair PRB Salt Creek Natrona, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on E. Salt Creek A-10
Harold (Z.W.) 44X-26

25-035-21193-00-00

 Shell Oil Montana Thrust Belt Mission Area Glacier, MT-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Harold (Z.W.) 44X-26
Peppel #31X-7

05-039-06043

 Shell Oil Denver Wildcat Elbert, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Peppel #31X-7
Tanner 4-4 (Unit 4-4)

25-075-21499-00-00

 Sam Gary PRB Bell Creek Powder River, MT-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Tanner 4-4 (Unit 4-4)
Halverson #1

49-005-05542

 Sinclair PRB Halverson Campbell, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Halverson #1
E. Salt Creek A-11

49-025-08993

 Sinclair PRB Salt Creek Natrona, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on E. Salt Creek A-11