PANGAEA_770361 (Table 1) Geochemistry of volcanic glass shards from tephra layers of the Gulf of Aden and in the Turkana Basin Sarna-Wojcicki, Andrei M; Meyer, C E; Roth, Peter H; Brown, F H (Table 1) Geochemistry of volcanic glass shards from tephra layers of the Gulf of Aden and in the Turkana Basin 1985 PANGAEA Dataset 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 https://doi.pangaea.de/10.1594/PANGAEA.770361 Investigator Andrei M Sarna-Wojcicki Earth Science Event label Number Sample code/label DEPTH, sediment/rock Sample comment Sample amount Silicon dioxide Silicon dioxide, standard deviation Aluminium oxide Aluminium oxide, standard deviation Iron oxide, Fe2O3 Iron oxide, Fe2O3, standard deviation Magnesium oxide Magnesium oxide, standard deviation Manganese oxide Manganese oxide, standard deviation Calcium oxide Calcium oxide, standard deviation Titanium dioxide Titanium dioxide, standard deviation Sodium oxide Sodium oxide, standard deviation Potassium oxide Potassium oxide, standard deviation Total geoscientificInformation 24-231 24-232A Drilling/drill rig Leg24 Sampling by hand Turkana_Basin DSDP/ODP/IODP sample designation Electron microprobe (EMP) Glomar Challenger 1972-05-04 1972-05-10 Complete 3.5833 14.4827 36.1167 51.9143 80.0 m (DEPTH, sediment/rock) 189.0 m (DEPTH, sediment/rock) DSDP Deep Sea Drilling Project unrestricted CC-BY-3.0: Creative Commons Attribution 3.0 Unported English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 364 data points text/tab-separated-values

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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.770361"!

http://www.deepseadrilling.org/ DSDP https://doi.org/10.1038/313306a0 Ages of tuff beds at East African early hominid sites and sediments in the Gulf of Aden https://doi.org/10.2973/dsdp.proc.24.1974 Leg24 https://en.wikipedia.org/wiki/Calcium_oxide Calcium oxide https://en.wikipedia.org/wiki/Silicon_dioxide Silicon dioxide https://en.wikipedia.org/wiki/Silicon_dioxide Silicon dioxide, standard deviation https://en.wikipedia.org/wiki/Titanium_dioxide Titanium dioxide https://en.wikipedia.org/wiki/Titanium_dioxide Titanium dioxide, standard deviation https://hdl.handle.net/10013/epic.27914.d001 DSDP/ODP/IODP sample designation https://www-odp.tamu.edu:443/glomar.html Glomar Challenger DIF 9.4 2026-02-06