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U-Pb zircon geochronology data for Spinney Mountain and Guffey NW Geologic Maps, Park County, CO

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 05:01 AM | Dataset Last Updated: April 14, 2025 at 12:00 AM
This data release includes laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) U-Pb zircon geochronology data from four samples collected from rock units located in the Spinney Mountain Quadrangle and the Guffey NW Quadrangle in Park County, Colorado. Samples were collected from gniess and granite rocks, and age data was used to support publication of updated maps by the Colorado Geological Survey.

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