| Abstract: | New paleomagnetic and potassium-argon dating measurements have been made of basalt flows from Nunivak Island, Alaska, with the following results. (1) The best estimate of the age of the Brunhes/Matuyama polarity epoch boundary is found to be 0.694 m.y. (2) The best estimate of the age of the Gauss/Gilbert boundary is 3.32 m.y. (3) Three normally magnetized flows with ages from 0.93 to 0.88 m.y. are in accord with previous estimates of the age and duration of the Jaramillo normal event. (4) One normally magnetized flow with an age of 1.65 ?? 0.09 m.y. supplies additional evidence for the Gilsa?? normal event. (5) Two new normal events are identified within the Gilbert reversed epoch, the "Cochiti normal event" with an age of 3.7 m.y. and the "Nunivak normal event" with an age of 4.1 m.y. ?? 1967. |
| Genre: | Article |
| ProdID: | 70011610 |
| Citation Author: | Cox, A.; Dalrymple, G. B. |
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| Citation End Page: | 177 |
| Citation Issue: | C |
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| Citation Language: | English |
| Citation Larger Work Title: | Earth and Planetary Science Letters |
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| Citation Number Of Pages: | 5 |
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| Citation Search Results Text: | Geomagnetic polarity epochs: Nunivak Island, Alaska; 1967; Article; Journal; Earth and Planetary Science Letters; Cox, A.; Dalrymple, G. B. |
| Citation Start Page: | 173 |
| Citation Volume: | 3 |
| Citation Year: | 1967 |
| Type: | citation/reference |
| Text: | Geomagnetic polarity epochs: Nunivak Island, Alaska; 1967; Article; Journal; Earth and Planetary Science Letters; Cox, A.; Dalrymple, G. B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 1967 00:00 -0600 |
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