Granulometry of surface sediments from the Panama Basin (Table 2, 3), supplement to: Thiede, Jörn (1977): Textural variations of calcareous coarse fractions in the Panama Basin (Eastern Equatorial Pacific Ocean). In: Andersen, N.R. & Malahoff, A. (eds.): The fate of fossil fuel CO2 in the Oceans. Plenum Publishing Corporation, New York, 673-692


Panama Basin sediment surface coarse fractions are dominantly composed of planktonic foraminiferal remains. Textural studies of these coarse fractions by means of a large diameter settling tube system reveal characteristics grain size spectra with important modes at 2.0-2.25 phi, 2.3-2.45 phi, 2.5-2.75 phi, 3.0-33 phi, and 3.4-3.75 phi. The coarser modes consist of large Globoquadrina dutertrei and Globorotalia menardii shells, the finer ones of small planktonic foraminiferal species and of shell fragments of the larger species. Analyses of samples from the Carnegie Gap provide sufficient information such that the extent of the high energy environment close to the sill depth can be mapped; the textural analyses also seem to indicate south and northward flowing components of the bottom currents which transport particle assemblages with distinct textural characteristics. The samples bear evidence for large scale removal of calcareous fines from the crest of structural highs; the fines are then dumped on the flanks of these elevations.

Metadata Access
Creator Thiede, Jörn
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2006
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 378 data points
Discipline Earth System Research
Spatial Coverage (-89.680W, -1.668S, 85.850E, 6.500N); South Pacific Ocean
Temporal Coverage Begin 1958-11-30T00:00:00Z
Temporal Coverage End 1971-10-11T00:00:00Z