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An Isotopic Study of Paleosol Carbonates from Olduvai Gorge

Published online by Cambridge University Press:  20 January 2017

Thure E. Cerling
Affiliation:
Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112-1183 USA
Richard L. Hay
Affiliation:
Department of Geology, 1301 West Green Street, University of Illinois, Urbana, Illinois 61801 USA

Abstract

The isotopic composition of paleosol carbonates from Olduvai Gorge can be used to give estimates of the paleoclimatic history of East Africa during the Plio-Pleistocene. Oxygen isotopes are indicative of major changes in the isotopic composition of meteoric water, while carbon isotopes are indicative of major changes in the fraction of biomass using the Hatch-Slack (C4) photosynthetic pathway. Three major periods of climatic change in this terrestrial setting occurred at about 1.67, 1.3, and 0.6 myr. These involved major changes in flora as well as major changes in the isotopic composition of meteoric water. Overall, the climate has become warmer and more arid over the past 2.2 myr.

Type
Original Articles
Copyright
University of Washington

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References

Baver, L. D., Gardner, W. H., Gardner, W. R. 4th ed. 1972 Soil Physics, Wiley New York Google Scholar
Bonnefille, R., Riollet, G. 1980 Palynologie végétation et climates de Bed I et Bed II à Olduvai Tanzanie. Proc. 8 cong. panafr. Préhist. et. Quatern., Nairobi, Sept. 1977 123 127 Google Scholar
Bottinga, Y. 1969 Calculated fractionation factors for carbon and hydrogen isotope exchange in the system calcite-carbon dioxide-graphite-methane-hydrogen-water vapor. Geochimica Cosmochimica Acta, 33 49 64 Google Scholar
Carslaw, H. S., Jaeger, J. C. 2nd ed. 1959 Conduction of Heat in Solids, Oxford New York Google Scholar
Cerling, T. E. 1984 The stable isotopic composition of soil carbonate and its relationship to climate. Earth and Planetary Science Letters, 71 229 240 Google Scholar
Cerling, T. E., Hay, R. L., O'Neil, J. R. 1977 Isotopic evidence for dramatic climatic changes in East Africa during the Pleistocene. Nature (London), 267 137 138 Google Scholar
Cerling, T. E., Hay, R. L., O'Neil, J. R. 1978 Isotopic, Geochemical, and Faunal Evidence for Pleistocene Climatic Change in East Africa, 63 65 United States Geological Survey Open File Report 78-701Google Scholar
Craig, H. 1961 Standards for reporting concentrations of deuterium and oxygen—18 in natural waters. Science (Washington, D.C.), 133 1833 CrossRefGoogle ScholarPubMed
Curtis, G. H., Hay, R. L. 1972 Further geologica studies and K-Ar dating of Olduvai Gorge and Ngorongoro Crater. Bishop, W. W., Miller, J. A. Calibration of Hominid Evolution, Scottish Academic Press Edinburgh 289 307 Google Scholar
Deines, P. 1980 The isotopic composition of reduced organic carbon. Fritz, P., Fontes, J.Ch. Handbook of Environmental Isotope Geochemistry, Vol. 1 Elsevier Amsterdam/New York 329 406 Google Scholar
Deines, P., Gold, D. P. 1973 The isotopic composition of carbonatite and kimberlite carbonates and their bearing on the isotopic composition of deep-seated carbon. Geochimica Cosmochimica Acta, 37 1709 1733 CrossRefGoogle Scholar
East African Meteorological Department, 1975 Climatological Statistics for East Africa, East African Community Nairobi Google Scholar
Friedman, I., O'Neil, J. R. 1977 Compilation of Stable Isotope Fractionation Factors of Geochemical Interest, United States Geological Survey Professional Paper 440-KKGoogle Scholar
Gromme, C. S., Hay, R. L. 1971 Geomagnetic polarity epochs: Age and duration of the Olduvai normal polarity event. Earth and Planetary Science Letters, 10 179 185 Google Scholar
Hay, R. L. 1970 Silicate Reactions in Three Lithofacies of a Semi-Arid basin. Olduvai Gorge, Tanzania. Mineralogical Society of America Special Paper, Vol. 3 237 255 Google Scholar
Hay, R. L. 1976 Geology of the Olduvai Gorge, Univ. California Press Berkeley CrossRefGoogle Scholar
Hay, R. L., Reeder, R. J. 1978 Calcretes of Olduvai Gorge and the Ndolanya Beds of northern Tanzania. Sedimentology, 25 649 673 Google Scholar
Irwin, H., Curtis, C., Coleman, M. 1977 Isotopic evidence for source of diagenetic carbonates formed during burial of organic-rich sediments. Nature (London), 269 209 213 CrossRefGoogle Scholar
Kappelman, J. 1984 Plio-Pleistocene environments of Bed I and lower Bed II, Olduvai Gorge, Tanzania. Palaeogeography, Palaeoclimatology, Palaeoecology, 48 171 196 Google Scholar
Kappelmeyer, O., Haenel, R. 1974 Geothermics, Gebruder Borntraeger Berlin Google Scholar
Kirkham, D., Powers, W. L. 1972 Advanced Soil Physics, Wiley Interscience New York Google Scholar
Livingstone, D. A., Clayton, W. D. 1980 An altitudinal cline in tropical African grass floras and its paleoecological significance. Quaternary Research, 13 392 402 CrossRefGoogle Scholar
Magaritz, M., Amiel, A. J. 1980 Calcium carbonate in calcareous soil from the Jordon Valley. Israel: Its origin revealed by the stable carbon isotope method. Soil Science Society of America Journal, 44 1059 1062 CrossRefGoogle Scholar
Mankinen, E. A., Dalrymple, G. B. 1979 Revised geomagnetic polarity scale for the interval 0–5 m.y. B.P.. Journal of Geophysical Research, 84 615 625 Google Scholar
Salomons, W. 1975 Chemical and isotopic composition of carbonates in Recent sediments and soils from Western Europe. Journal of Sedimentary Petrology, 45 440 449 Google Scholar
Salomons, W., Mook, W. G. 1976 Isotope chemistry of carbonate precipitation and dissolution in soils. Soil Science, 122 15 24 Google Scholar
Savin, S. M. 1977 The history of the earth's surface temperature during the past 150 m.y.. Annual Review of Earth and Planetary Science, 5 319 355 CrossRefGoogle Scholar
Shackleton, N. J., Opdyke, N. D. 1976 Oxygen isotope and paleomagnetic stratigraphy of Pacific core V28-239 late Pleistocene. Investigation of Late Quaternary Paleoceanography and Paleoclimatology, Cline, R. M., Hays, J. D. Geological Society of America Memoir, 145 449 464 CrossRefGoogle Scholar
Smith, G. A. 1984 Paleohydrologic regimes in the southwestern Great Basin, 0–3.2 my ago, compared with other records of “global climate”. Quaternary Research, 22 1 17 Google Scholar
Steiger, R. H., Jäger, E. 1977 Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters, 36 359 362 Google Scholar
Teeri, J., Stowe, L. G. 1976 Climatic patterns and the distribution of C4 grasses in North America. Oecologia, 23 1 12 Google Scholar
Tieszen, L. L., Senyimba, M. M., Imbamba, S. K., Troughton, J. H. 1979 The distribution of C3 and C4 grasses and carbon isotope discrimination along an altitudinal and moisture gradient in Kenya. Oecologia, 37 337 350 CrossRefGoogle ScholarPubMed
Young, H. J., Young, T. P. 1983 Local distribution of C3 and C4 grasses in sites of overlap on Mount Kenya. Oecolgia, 58 373 377 CrossRefGoogle ScholarPubMed