| Abstract: | Very well-preserved Pliocene diatoms from a diatomite unit interbedded within glacial sediments at Ocean Drilling Program Site 742 in Prydz Bay, Antarctica are documented and illustrated. The presence of Thalassiosira kolbei, T. torokina, Actinocyclus actinochilus, A. karstenii and the absence of Nitzschia interfrigidaria. T. insigna and T. vulnifica in Sample 119-742A-15R-4, 44-46cm constrain its age to ca. 2.2-1.8 Ma (late Pliocene). Diatoms associated with sea ice constitute 35% of the Pliocene diatom assemblage, compared with 71% of the modern sediment assemblage at the site, suggesting that sea ice was present during the late Pliocene period of deposition of the sample, although it probably was not the significant feature it is today. Thalassiosira ellitipora (Donahue) Fenner is described and illustrated in detail and is validly published. An expanded description and numerous illustrations are also presented for T. torokina Brady. |
| Genre: | Article |
| ProdID: | 70018941 |
| Citation Author: | Mahood, A. D.; Barron, J. A. |
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| Citation End Page: | 302 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Micropaleontology |
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| Citation Number Of Pages: | 18 |
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| Citation Search Results Text: | Late Pliocene diatoms in a diatomite from Prydz Bay, East Antarctica; 1996; Article; Journal; Micropaleontology; Mahood, A. D.; Barron, J. A. |
| Citation Start Page: | 285 |
| Citation Volume: | 42 |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | Late Pliocene diatoms in a diatomite from Prydz Bay, East Antarctica; 1996; Article; Journal; Micropaleontology; Mahood, A. D.; Barron, J. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1996 00:00 -0600 |
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