Unpublished Paper
Anomalous upland gravel unit in Pecos area of northern New Mexico.docx
discussion papers
(2024)
Abstract
An extensive cobble-boulder gravel in the area of Pecos and its National Historical Park is anomalous both in its depositional geometry and its clast population, the latter dominated by metasedimentary muscovite gneiss and quartzite. Derivation is from high-grade metamorphic units of the northernmost Pecos River headwaters that form a very small fraction of the drainage. A short-lived transport system is consistent with the depositional geometry of the gravel, which is draped over a large area, apparently as an outwash fan now stranded by later downcutting of the Pecos River. Episodic outflow due to glacial or post-glacial mass-wasting is suggested by the geomorphology of the headwater area among the Truchas Peaks.
Keywords
- glaciation,
- mass-wasting,
- sillimanite,
- Pecos National Historical Park,
- quartzite
Disciplines
Publication Date
March 28, 2024
Citation Information
Eric R Force. "Anomalous upland gravel unit in Pecos area of northern New Mexico.docx" discussion papers (2024) Available at: http://works.bepress.com/eric_force/25/