| Abstract: | Submarine erosion, associated with changes in position of the proto-Gulf Stream, was the dominant mechanism controlling the formation of the Cretaceous-Tertiary unconformity in AMCOR borehole 6004. Paleontologic evidence indicates that this unconformity, which is marked by a gravelly-sand enriched in glauconitic and phosphoritic concretions, represents a hiatus of about 7 m.y. Both Cretaceous and Paleocene sediments contain middle-outer neritic foraminiferal assemblages that become more diverse with distance from the contact. Of the elemental abundances measured, Al, Ba, Co, Fe, Ga, K, Mg/Ca, Mo, Ni, P, Sr/Ca, V, Y, and Zn show a strong positive correlation with proximity to the contact, probably as a result of the concentration of authigenic and heavy minerals present as lag sediments on the erosion surface. ?? 1986. |
| Genre: | Article |
| ProdID: | 70014542 |
| Citation Author: | Poppe, L. J.; Hathaway, J. C.; Hall, R. E.; Commeau, R. F. |
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| Citation End Page: | 135 |
| Citation Issue: | 2-4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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| Citation Number Of Pages: | 19 |
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| Citation Search Results Text: | Formation of the Shelf-edge Cretaceous-Tertiary contact off the southeastern U.S. Coast; 1986; Article; Journal; Palaeogeography, Palaeoclimatology, Palaeoecology; Poppe, L. J.; Hathaway, J. C.; Hall, R. E.; Commeau, R. F. |
| Citation Start Page: | 117 |
| Citation Volume: | 57 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Formation of the Shelf-edge Cretaceous-Tertiary contact off the southeastern U.S. Coast; 1986; Article; Journal; Palaeogeography, Palaeoclimatology, Palaeoecology; Poppe, L. J.; Hathaway, J. C.; Hall, R. E.; Commeau, R. F. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
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