La Yeguada volcanic vomplex in the Republic of Panama: An assessment of the geologic hazards using 40Ar/39Ar geochronology

Authors

Karinne L. Knutsen, Michigan Technological University
William I. Rose, Michigan Technological UniversityFollow
Brian Jicha, University of Wisconsin - Madison

Document Type

Article

Publication Date

11-26-2013

Abstract

La Yeguada volcanic complex is one of three Quaternary volcanic centers in Panama. To assess potential geologic hazards, new samples were analyzed using argon analysis (⁴⁰Ar/³⁹Ar), and obtained the following: the most recent eruption occurred approximately 32,000 years ago at the Media Luna cinder cone; the youngest dated eruption from the main dome complex occurred 357 ± 19 ka, producing the Castillo dome unit; Cerro Picacho, a separate dacite dome 1.5 km east of the main complex is 4.47 ± 0.23 Ma; and the El Satro Pyroclastic Flow unit surrounds the northern portion of the volcanic complex is 11.26 ± 0.17 Ma. No Holocene (10,000 years ago to present) activity is recorded at the La Yeguada volcanic complex and therefore, it is unlikely to produce another eruption. The main geologic hazard at the La Yeguada volcanic complex is from landslides coming off the many steep slopes.

Publisher's Statement

© 2013 Universidad de Costa Rica. Article deposited here in compliance with publisher policy. Publisher's version of record: http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0256-70242013000200001

Publication Title

Revista Geológica de América Central

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 License.

Recommended Citation

Knutsen, K. L., Rose, W. I., & Jicha, B. (2013). La Yeguada volcanic vomplex in the Republic of Panama: An assessment of the geologic hazards using 40Ar/39Ar geochronology. Revista Geológica de América Central, 49, 7-23.
Retrieved from: https://digitalcommons.mtu.edu/geo-fp/2

Version

Publisher's PDF