Geologic Hazards and Disasters Research Group

« Back to Projects

Precariously Balanced Rocks (PBRs)

Investigators

Lisa Grant and Sinan Akciz at UC Irvine.
James N. Brune, Matthew D. Purvance, Abdolrasool Anooshehpoor at UNR.
Katherine Kendrick at USGS, Pasadena
Lesley A. Perg at UMN

Summary

PBRs are toppled by strong shaking from earthquakes. This project focuses on determining the ages, rates of formation, and location of PBRs for constraining seismic hazard.

Funding

SCEC

Publications

Abstracts

  1. Perg, L.A., Grant Ludwig, L., Kendrick, K., Brune, J., Purvance, M., Anooshehpoor, R., Akciz, S.O., Weiser, D., 2007, Natural Paleoseismometers: Cosmogenic Nuclide Dating of Precariously Balanced Rocks (PBRs) - Integral Constraints on Maximum Ground Accelerations: Eos Trans. AGU, 88 (52), Fall Meet. Suppl., Abstract NS11E-0831.

  2. Grant Ludwig, L., Kendrick, K., Perg, L.A., Brune, J., Purvance, M., Anooshehpoor, R., Akciz, S.O., 2007, Preliminary Sample Collection and Methodology for Constraining Age of Precariously Balanced Rocks (PBR): Southern California Earthquake Center Annual Meeting, Proceedings and Abstracts, vol. 17, p. 114.

  3. Perg, L.A., Grant Ludwig, L., Kendrick, K., Brune, J., Purvance, M., Anooshehpoor, R., Akciz, S.O., Weiser, D., 2007, Precariously Balanced Rocks (PBR) Surface Exposure History, Constrained by In-Situ Terrestrial Cosmogenic Nuclides (TCNs): Southern California Earthquake Center Annual Meeting, Proceedings and Abstracts, vol. 17, p. 156.

  4. Purvance, M., Anooshehpoor, R., Brune, J., Brune, R., Weiser, D., Kendrick, K., Akciz, S.O., Grant Ludwig, L., 2007, Natural Paleoseismometers: Cosmogenic Nuclide Dating of Precariously Balanced Rocks (PBRs) - Integral Constraints on Maximum Ground Accelerations: Southern California Earthquake Center Annual Meeting, Proceedings and Abstracts, vol. 17, p. 162.

Images