Further paleomagnetic results for the San Juan volcanic field of southern Colorado |
| |
| Authors: | Myrl E Beck Steven D Sheriff Jimmy F Diehl Ernest A Hailwood Peter W Lipman |
| |
| Institution: | 1. U.S. Geological Survey, Western Washington State College, Bellingham, Wash. 98225USA;2. Department of Geology, Western Washington State College, Bellingham, Wash. 98225USA |
| |
| Abstract: | Combining paleomagnetic data for 17 new sites from the northwest portion of the (Oligocene) San Juan volcanic field of southern Colorado with data for 29 sites previously published yields a paleomagnetic pole at 85°N, 114°E (with a 95% confidence circle of 7.5° radius). A further combination of the San Juan data with the results of other studies on rocks of Oligocene age from tectonically stable parts of North America gives a mid-Tertiary reference pole located at 81°N, 132.5°E, with a confidence circle of approximately 4°. Mid-Tertiary paleomagnetic poles for the western edge of the continent diverge markedly from this reference pole. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
