Geomagnetic polarity epochs
Cox A, Doell RR, Dalrymple GB. 1964. Geomagnetic polarity epochs. Science. 143(3604):351-352
In June of 1963 we published paleomagnetic results from six radiometrically dated volcanic flows from the Sierra Nevada of California, and 4 months later two additional studies appeared almost simultaneously, one by us on more material from the Sierra Nevada, and one by McDougall and Tarling on volcanic rocks from the Hawaiian Islands. All of the data from these three studies are consistent with the geomagnetic field's having had normal polarity back to about 1 million years (eight radiometric dates from normal flows) and having had reversed polarity between l and 1.8 million years (19 radiometric dates from reversed flows). In rocks older than this several discrepancies appear between the results from California and those from Hawaii. In an attempt to account for these discrepancies, we have reexamined all of our data and have found no reason to distrust any of our paleomagnetic or radiometric results, but we have discovered errors in our geologic correlations which remove two of the discrepancies.
- Type
- Journal Article
- Authors
- Cox, Allan; Doell, Richard; Dalrymple, G.
- Units
- HAVO
- Keywords
- Hawaiian Archipelago, Non-Seismic Geophysics, Paleomagnetism