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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
Horsetail 19N-1924M

05-123-39885

 Whiting Oil & Gas Corp. Denver Redtail Weld, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Horsetail 19N-1924M
Terrace 36-32M

05-123-32491

 Whiting Oil & Gas Corp. Denver Redtail Weld, CO-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Terrace 36-32M
Marton Fed #20-1

49-019-20185

 Woods Pet. PRB Wildcat Johnson, WY-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Marton Fed #20-1
Horsetail 29G-2043

05-123-38807

 Whiting Oil & Gas Corp. Denver Redtail Weld, CO-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Horsetail 29G-2043
Wolf 12L-0103

05-123-39421

 Whiting Oil & Gas Corp. Denver Redtail Weld, CO-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Wolf 12L-0103
Reed #41-25

25-091-21541-00-00

 Xplor Energy Corp Williston Bell Creek Sheridan, MT-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Reed #41-25
#2 Linnebur

05-001-06668

 X O Exploration Denver Homestead Adams, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on #2 Linnebur
Razor 26J-2633L

05-123-37495

 Whiting Oil & Gas Corp. Denver Redtail Weld, CO-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Razor 26J-2633L
#1 Marty Bros.

05-001-06595

 X O Exploration Denver First Creek Adams, CO-US SlabS Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on #1 Marty Bros.
Glaspey SWD 1

33-013-90394-00-00

 Windridge Oil & Gas Williston Short Creek Burke, ND-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Glaspey SWD 1
Wildhorse 16-13L

05-123-37374

 Whiting Oil & Gas Corp. Denver Wildcat Weld, CO-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Wildhorse 16-13L
Razor 25-2514H

05-123-36418

 Whiting Oil & Gas Corp. Denver Redtail Weld, CO-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Razor 25-2514H
Two Mile Creek #22-33M

05-123-33105

 Whiting Petroleum Corporation Denver Wildcat Weld, CO-US SlabS Photos Right arrow icon A white rectangle with a right arrow icon inside, representing a navigation symbol. View More Information on Two Mile Creek #22-33M
#1 McBride State

05-123-07360

 Willis Oil & Gas Denver Wildcat 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 McBride State