Origin of the Bermuda volcanoes and the Bermuda Rise: History, observations, models, and puzzles

Stratigraphy and structure along a continuous seismic reflection profile from Cape Hatteras, North Carolina, to the Bermuda Rise

Journal of Geophysical Research Atmospheres ◽

10.1029/jz072i008p02107 ◽

1967 ◽

Vol 72 (8) ◽

pp. 2107-2130 ◽

Cited By ~ 21

Author(s):

Peter A. Rona ◽

C. S. Clay

Keyword(s):

North Carolina ◽

Seismic Reflection ◽

Seismic Reflection Profile ◽

Reflection Profile ◽

Cape Hatteras ◽

Bermuda Rise

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Radiocarbon Dating of Alkenones from Marine Sediments: III. Influence of Solvent Extraction Procedures on 14C Measurements of Foraminifera

Radiocarbon ◽

10.1017/s0033822200035207 ◽

2005 ◽

Vol 47 (3) ◽

pp. 425-432 ◽

Cited By ~ 10

Author(s):

Naohiko Ohkouchi ◽

Timothy I Eglinton ◽

Konrad A Hughen ◽

Ellen Roosen ◽

Lloyd D Keigwin

Keyword(s):

Solvent Extraction ◽

Climate Changes ◽

Extraction Procedures ◽

Surface Ocean ◽

The Past ◽

Proxy Records ◽

Temporal Relationships ◽

Ocean Properties ◽

Bermuda Rise ◽

Influence Of Solvent

As a result of the growing use of multiple geochemical proxies to reconstruct ocean and climate changes in the past, there is an increasing need to establish temporal relationships between proxies derived from the same marine sediment record and ideally from the same core sections. Coupled proxy records of surface ocean properties, such as those based on lipid biomarkers (e.g. alkenone-derived sea surface temperature) and planktonic foraminiferal carbonate (oxygen isotopes), are a key example. Here, we assess whether 2 different solvent extraction procedures used for isolation of molecular biomarkers influence the radiocarbon contents of planktonic foraminiferal carbonate recovered from the corresponding residues of Bermuda Rise and Cariaco Basin sediments. Although minor Δ14C differences were observed between solvent-extracted and unextracted samples, no substantial or systematic offsets were evident. Overall, these data suggest that, in a practical sense, foraminiferal shells from a solvent-extracted residue can be reliably used for 14C dating to determine the age of sediment deposition and to examine age relationships with other sedimentary constituents (e.g. alkenones).

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