Cornell University Borehole Observatory Sidewall Core Data
This data set includes sidewall core data from well Cornell ESH #1 (API 31109300030000), known as the Cornell University Borehole Observatory, or CUBO. It is a stratigraphic well drilled to characterize potential EGS resources. The Drilling commenced on June 21, 2022 and total depth of 9790 feet below KB was reached on August 13, 2022. The upper part if the well was drilled through 9400 feet of sedimentary rocks before penetrating into 390 feet of crystalline basement rock.
Upon reaching total depth, logging and testing was completed in the open hole section of the borehole (7800-9790 feet). Sidewall coring comprised 25 samples (nominal size 1.5-in diameter and 2.5-in length) drilled perpendicular to the borehole wall, at depths ranging from 7885 feet to 9505 feet. The lower six cores were collected from the crystalline basement rock.
Data files include photographs of all 25 core samples and more detailed documentation of basement rock core properties, including tomographic images and thin section images. A table is provided giving the sidewall core identification labels, depths, geologic formation corresponding to each core, lithology, percent recovery, and orientation of the horizontal core relative to north.
Citation Formats
TY - DATA
AB - This data set includes sidewall core data from well Cornell ESH #1 (API 31109300030000), known as the Cornell University Borehole Observatory, or CUBO. It is a stratigraphic well drilled to characterize potential EGS resources. The Drilling commenced on June 21, 2022 and total depth of 9790 feet below KB was reached on August 13, 2022. The upper part if the well was drilled through 9400 feet of sedimentary rocks before penetrating into 390 feet of crystalline basement rock.
Upon reaching total depth, logging and testing was completed in the open hole section of the borehole (7800-9790 feet). Sidewall coring comprised 25 samples (nominal size 1.5-in diameter and 2.5-in length) drilled perpendicular to the borehole wall, at depths ranging from 7885 feet to 9505 feet. The lower six cores were collected from the crystalline basement rock.
Data files include photographs of all 25 core samples and more detailed documentation of basement rock core properties, including tomographic images and thin section images. A table is provided giving the sidewall core identification labels, depths, geologic formation corresponding to each core, lithology, percent recovery, and orientation of the horizontal core relative to north.
AU - Tester, J.W.
A2 - Jordan, T.E.
A3 - Fulton, P.M.
A4 - Fulcher, S.A.
A5 - Gustafson, J.O.
A6 - Erdinc, B.
DB - Geothermal Data Repository
DP - Open EI | National Laboratory of the Rockies
DO -
KW - geothermal
KW - energy
LA - English
DA - 2026/07/16
PY - 2026
PB - Cornell University
T1 - Cornell University Borehole Observatory Sidewall Core Data
UR - https://gdr.openei.org/submissions/1851
ER -
Tester, J.W., et al. Cornell University Borehole Observatory Sidewall Core Data. Cornell University, 16 July, 2026, Geothermal Data Repository. https://gdr.openei.org/submissions/1851.
Tester, J., Jordan, T., Fulton, P., Fulcher, S., Gustafson, J., & Erdinc, B. (2026). Cornell University Borehole Observatory Sidewall Core Data. [Data set]. Geothermal Data Repository. Cornell University. https://gdr.openei.org/submissions/1851
Tester, J.W., T.E. Jordan, P.M. Fulton, S.A. Fulcher, J.O. Gustafson, and B. Erdinc. Cornell University Borehole Observatory Sidewall Core Data. Cornell University, July, 16, 2026. Distributed by Geothermal Data Repository. https://gdr.openei.org/submissions/1851
@misc{GDR_Dataset_1851,
title = {Cornell University Borehole Observatory Sidewall Core Data},
author = {Tester, J.W. and Jordan, T.E. and Fulton, P.M. and Fulcher, S.A. and Gustafson, J.O. and Erdinc, B.},
abstractNote = {This data set includes sidewall core data from well Cornell ESH #1 (API 31109300030000), known as the Cornell University Borehole Observatory, or CUBO. It is a stratigraphic well drilled to characterize potential EGS resources. The Drilling commenced on June 21, 2022 and total depth of 9790 feet below KB was reached on August 13, 2022. The upper part if the well was drilled through 9400 feet of sedimentary rocks before penetrating into 390 feet of crystalline basement rock.
Upon reaching total depth, logging and testing was completed in the open hole section of the borehole (7800-9790 feet). Sidewall coring comprised 25 samples (nominal size 1.5-in diameter and 2.5-in length) drilled perpendicular to the borehole wall, at depths ranging from 7885 feet to 9505 feet. The lower six cores were collected from the crystalline basement rock.
Data files include photographs of all 25 core samples and more detailed documentation of basement rock core properties, including tomographic images and thin section images. A table is provided giving the sidewall core identification labels, depths, geologic formation corresponding to each core, lithology, percent recovery, and orientation of the horizontal core relative to north.},
url = {https://gdr.openei.org/submissions/1851},
year = {2026},
howpublished = {Geothermal Data Repository, Cornell University, https://gdr.openei.org/submissions/1851},
note = {Accessed: 2026-07-17}
}
Details
Data from Jul 16, 2026
Last updated Jul 17, 2026
Submission in progress
Organization
Cornell University
Contact
Jefferson Tester
Authors
Keywords
geothermal, energyDOE Project Details
Project Name Ground-Truthing: Exploratory Borehole Characterization and Modeling to Verify and Expand Techno-Economic Evaluation of Earth Source Heat at Cornell U
Project Lead Jeffrey Bowman
Project Number EE0009255
