Investigation of Quaternary diatoms in sediment core CRP-1 from the Ross Sea, Antarctica ...

• Main Authors: Bohaty, Steven M, Scherer, Reed P, Harwood, David M
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1998
• Subjects: Core wireline system; CRP-1; Sampling/drilling ice; Cape Roberts Project CRP; Antarc*; Antarctica; antartic*; McMurdo Sound; Ross Sea; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.510744; https://doi.pangaea.de/10.1594/PANGAEA.510744

In the first season of drilling, the Cape Roberts Project (CRP) recovered one drillcore (CRP-l) from Roberts Ridge in western McMurdo Sound, Ross Sea, Antarctica Diatom biostratigraphy places the upper six lithostratigraphic units (Units 1.1, 2.1, 2.2, 2.3, 3.1, and 4.1) of CRP-l (0.0 to 43.15 mbsf) within the Quaternary. Both non-marine and marine Quaternary diatoms occur in variable abundance in the Quaternary interval of CRP- 1 Biostratigraphic data resolve two Quaternary time slices or events within CRP-1. Marine diatom assemblages in Units 4.1 and 3.1 represent sedimentation within the diatom Actinocyclus ingens Zone (1.35 to 0.66 Ma). Further refinement of the age of Unit 3.l places deposition in the interval 1.15 to 0.75 Ma based on the common occurrence of Thalassiosira elliptipora and correlation to the Southern Ocean acme of this taxon The absence of ActiActinocyclus ingens and the presence ot Thalassiosira antarctica in Unit 2.2 require a younger zonal assignment for this interval, within the ... : Supplement to: Bohaty, Steven M; Scherer, Reed P; Harwood, David M (1998): Quaternary diatom biostratigraphy and palaeoenvironments of the CRP-1 drillcore, Ross Sea, Antarctica. Terra Antartica, 5(3), 431-453 ...