| Abstract: | The Cretaceous-Tertiary boundary in south-central Saskatchewan is marked by coincident anomalies in abundance of iridium and fern spores at the extinction level of a suite of Cretaceous pollen taxa. Evidence of disruption of the terrestrial flora includes the fern-spore abundance anomaly and local extinction of as much as 30 percent of angiosperm species. The reorganized earliest Tertiary flora is made up largely of surviving species that assumed new roles of dominance. Persistence of climatically sensitive taxa across the boundary indicates that if paleoclimate was altered by the terminal Cretaceous event, it returned quickly to the pre-event condition. |
| Genre: | Article |
| ProdID: | 70014520 |
| Citation Author: | Nichols, D. J.; Jarzen, D. M.; Orth, C. J.; Oliver, P. Q. |
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| Citation End Page: | 717 |
| Citation Issue: | 4739 |
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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: | Palynological and iridium anomalies at Cretaceous-Tertiary boundary, south-central Saskatchewan; 1986; Article; Journal; Science; Nichols, D. J.; Jarzen, D. M.; Orth, C. J.; Oliver, P. Q. |
| Citation Start Page: | 714 |
| Citation Volume: | 231 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Palynological and iridium anomalies at Cretaceous-Tertiary boundary, south-central Saskatchewan; 1986; Article; Journal; Science; Nichols, D. J.; Jarzen, D. M.; Orth, C. J.; Oliver, P. Q. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
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