Reference 1384
Plescia, J B; Calderone, Gary J; Snee, Lawrence W (1994) U. S. Geological Survey Bulletin, Report: B 2100, 11 pp., 1994
| Authors | Plescia, J B; Calderone, Gary J; Snee, Lawrence W |
|---|---|
| Year | 1994 |
| Source | U. S. Geological Survey Bulletin, Report: B 2100, 11 pp., 1994 |
| Pages | 11 pp. |
| Publisher | U. S. Geological Survey, Reston, VA, United States USA |
| ISSN | 8755-531X |
| GeoRef | 1994-052344 |
| Keywords | absolute age; Ar/Ar; basalts; California; Cenozoic; dates; igneous rocks; Kern County California; lava; lava flows; Miocene; Neogene; neotectonics; paleomagnetism; pole positions; rotation; Southern California; tectonics; Tehachapi Mountains; Tertiary; United States; USGS; volcanic rocks |
Abstract
Paleomagnetic directions and isotopic dates have been determined for Miocene basalt flows exposed along the northern flank of the Tehachapi Mountains, Calif. super 40 Ar/ super 39 Ar spectrum-analyses yield an average extrusion age of 22.6 + or - 0.6 Ma. The paleomagnetic data set of 22 flow-mean directions and virtual geomagnetic poles VGPs probably does not adequately average the secular variation of the Miocene geomagnetic field. Consequently, no tectonic significance may be attached to the mean pole of the 22 site mean VGPs.