| Abstract: | New paleomagnetic, paleontologic, and stratigraphic data from outcrops of the Laytonville Limestone (101 to 88 million years old) support a Southern Hemisphere orgin. A paleomagnetic megaconglomerate test is statistically significant and suggests magnetization at 14?? ?? 5?? south, predating Late Cretaceous to Eocene (70 to 50 million years ago) accretion. Rapid Kula plate movement or the existence and demise of a now vanished oceanic plate (or both) are required to accommodate the greater than 50?? of poleward displacement implied by the paleomagnetic data. This rapid motion brings into question the validity of a "speed limit" for absolute plate velocity based on present-day plate motions. |
| Genre: | Article |
| ProdID: | 70014600 |
| Citation Author: | Tarduno, J. A.; McWilliams, M.; Sliter, W. V.; Cook, H. E.; Blake, Jr. , M. C.; Premoli-Silva, I. |
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| Citation End Page: | 1428 |
| Citation Issue: | 4744 |
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| Citation Language: | English |
| Citation Larger Work Title: | Science |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Southern hemisphere origin of the Cretaceous Laytonville Limestone of California; 1986; Article; Journal; Science; Tarduno, J. A.; McWilliams, M.; Sliter, W. V.; Cook, H. E.; Blake, Jr. , M. C.; Premoli-Silva, I. |
| Citation Start Page: | 1425 |
| Citation Volume: | 231 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Southern hemisphere origin of the Cretaceous Laytonville Limestone of California; 1986; Article; Journal; Science; Tarduno, J. A.; McWilliams, M.; Sliter, W. V.; Cook, H. E.; Blake, Jr. , M. C.; Premoli-Silva, I. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
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