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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
1-B Warren Farms

05-123-07239

 Pan AM Denver Wattenberg Weld, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on 1-B Warren Farms
Taack #25 (Unit 7408)

25-075-21638-00-00

 Midwest oil 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 Taack #25 (Unit 7408)
State (Colorado) 4-5-60 #2

05-005-06146

 Midwest Oil Denver Peoria Arapahoe, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on State (Colorado) 4-5-60 #2
Taack #34

25-075-21677-00-00

 Midwest oil 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 Taack #34
Braukmann Farm 1

05-073-06096

 Mull Drilling Co Denver Clifford Lincoln, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Braukmann Farm 1
State (Colorado) 34-3-59 #3

05-001-06327

 Midwest Oil Denver Poncho Adams, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on State (Colorado) 34-3-59 #3
Taack #31 (Unit 2409)

25-075-21664-00-00

 Midwest oil 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 Taack #31 (Unit 2409)
#1 Golden cycle

05-055-06023

 Minerals Mgmt Inc Raton Wildcat Huerfano, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on #1 Golden cycle
#1 Jackson

33-061-00171-00-00

 Monsanto Williston Wildcat Mountrail, ND-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on #1 Jackson
#1 Knox

33-075-00153-00-00

 Monsanto Williston Wildcat Renville, ND-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on #1 Knox
#2 Ring

33-009-01395-00-00

 Monsanto Williston Mohall Bottineau, ND-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on #2 Ring
Spearhead Ranch #2

49-009-20433

 Mtn. Fuel Supply PRB Spearhead Ranch Converse, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Spearhead Ranch #2
Spearhead Ranch #3

49-009-20434

 Mtn. Fuel Supply PRB Spearhead Ranch Converse, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Spearhead Ranch #3
Spearhead Ranch #4

49-009-20512

 Mtn. Fuel Supply PRB Spearhead Ranch Converse, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Spearhead Ranch #4