Late Pliocene diatoms in a diatomite from Prydz Bay, East Antarctica
Micropaleontology
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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.
Suggested Citation
Mahood, A., Barron, J., 1996, Late Pliocene diatoms in a diatomite from Prydz Bay, East Antarctica: Micropaleontology, v. 42, no. 3, p. 285-302.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Late Pliocene diatoms in a diatomite from Prydz Bay, East Antarctica |
| Series title | Micropaleontology |
| Volume | 42 |
| Issue | 3 |
| Year Published | 1996 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Micropaleontology |
| First page | 285 |
| Last page | 302 |