de.pangaea.dataset770361 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-02-06T11:41:47Z https://doi.pangaea.de/10.1594/PANGAEA.770361 1985-01-01 publication https://doi.org/10.1594/PANGAEA.770361 Sarna-Wojcicki, Andrei M author Meyer, C E author Roth, Peter H author Brown, F H author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital Supplement to: Sarna-Wojcicki, Andrei M; Meyer, C E; Roth, Peter H; Brown, F H (1985): Ages of tuff beds at East African early hominid sites and sediments in the Gulf of Aden. Nature, 313(6000), 306-308, https://doi.org/10.1038/313306a0 The early hominids of East Africa were dated by determining the ages of tuff beds at the sites. Despite much research using palaeomagnetic and K/Ar-dating techniques, some of those ages are still controversial (Brown, 1982, doi:10.1038/300631a0; Aronoson et al., 1983, doi:10.1038/306209c0). To obtain independent age estimates for these tephra layers, we have examined cores from DSDP Sites 231 and 232 in the Gulf of Aden which consist mainly of calcareous nannofossil ooze, but also contain rare tephra horizons (Brunce and Fisher, 1974, doi:10.2973/dsdp.proc.24.101.1974) dated by interpolation from the established nannofossil stratigraphy. Chemical analysis confirms that the identity and sequence of these horizons is the same as that at the East African sites. We conclude that the age of the Tulu Bor Tuff is <3.4 Myr and hence that the Hadar hominid specimens are also <~3.4 Myr old. completed Sarna-Wojcicki, Andrei M principalInvestigator DSDP Deep Sea Drilling Project theme 1995-01-01 creation PANGAEA

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https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation 36.1167 51.9143 3.5833 14.4827 1972-05-04T00:00:00 1972-05-10T00:00:00 80.0 189.0 Event label thematicClassification Number thematicClassification Sample code/label thematicClassification DSDP/ODP/IODP sample designation DEPTH, sediment/rock physicalMeasurement m m Sample comment thematicClassification Sample amount physicalMeasurement number of shards analysed # # Silicon dioxide physicalMeasurement Electron microprobe (EMP) % % Silicon dioxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Aluminium oxide physicalMeasurement Electron microprobe (EMP) % % Aluminium oxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Iron oxide, Fe2O3 physicalMeasurement Electron microprobe (EMP) % % Iron oxide, Fe2O3, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Magnesium oxide physicalMeasurement Electron microprobe (EMP) % % Magnesium oxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Manganese oxide physicalMeasurement Electron microprobe (EMP) % % Manganese oxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Calcium oxide physicalMeasurement Electron microprobe (EMP) % % Calcium oxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Titanium dioxide physicalMeasurement Electron microprobe (EMP) % % Titanium dioxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Sodium oxide physicalMeasurement Electron microprobe (EMP) % % Sodium oxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Potassium oxide physicalMeasurement Electron microprobe (EMP) % % Potassium oxide, standard deviation physicalMeasurement Electron microprobe (EMP) ± ± Total physicalMeasurement Electron microprobe (EMP); original totals % % text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.770361?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: 24-231 * LATITUDE: 11.890200 * LONGITUDE: 48.245200 * DATE/TIME: 1972-05-04T00:00:00 * ELEVATION: -2152.0 m * Penetration: 584 m * Recovery: 425.8 m * LOCATION: Indian Ocean/Gulf of Aden/BASIN * CAMPAIGN: Leg24 * BASIS: Glomar Challenger * METHOD/DEVICE: Drilling/drill rig 64 cores; 583.7 m cored; 0 m drilled; 72.9 % recovery 1972-05-04T00:00:00 EVENT LABEL: 24-232A * LATITUDE: 14.482700 * LONGITUDE: 51.914300 * DATE/TIME: 1972-05-10T00:00:00 * ELEVATION: -1726.0 m * Penetration: 434 m * Recovery: 125.2 m * LOCATION: Indian Ocean/Gulf of Aden/TRENCH * CAMPAIGN: Leg24 * BASIS: Glomar Challenger * METHOD/DEVICE: Drilling/drill rig 27 cores; 253 m cored; 22 m drilled; 49.5 % recovery 1972-05-10T00:00:00 EVENT LABEL: Turkana_Basin * LATITUDE: 3.583300 * LONGITUDE: 36.116700 * LOCATION: Kenya * METHOD/DEVICE: Sampling by hand