Mega-Lake in the Kalahari: A Late Pleistocene record of the Palaeolake Makgadikgadi system

Quaternary Science Reviews

Volumn 28, Issue 15-16, 2009, Pages 1392-1411

  Burrough, Sallie L ^a   Thomas, David S G ^a,b   Bailey, Richard M ^a  

^a UNIVERSITY OF OXFORD   (United Kingdom)

^b UNIVERSITY OF CAPE TOWN   (South Africa)

Author keywords

[No Author keywords available]

Indexed keywords

BEACH RIDGE; BOTSWANA; FOUR-CORE; KALAHARI; LANDSAT IMAGERY; LATE PLEISTOCENE RECORD; OPTICALLY STIMULATED LUMINESCENCE; RESEARCH PROGRAMME; SHUTTLE RADAR TOPOGRAPHY MISSION; SOUTHERN HEMISPHERE; THREE COMPONENT;

ATMOSPHERICS; BEACHES; COALESCENCE; TRACKING RADAR;

LAKES;

BEACH; DATING METHOD; IMAGING METHOD; LAKE; LANDSAT; PLEISTOCENE; SHUTTLE RADAR TOPOGRAPHY MISSION;

AFRICA; BOTSWANA; MAKGADIKGADI; SOUTHERN AFRICA; SUB-SAHARAN AFRICA;

EID: 67349125427     PISSN: 02773791     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.quascirev.2009.02.007     Document Type: Article

References (119)

1. Adamiec G., and Aitken M.J. Dose-rate conversion factors: update. Ancient TL 16 (1998) 37-50
2. Armitage S.J., Drake N.A., Stokes S., El-Hawat A., Salem M.J., White K., Turner P., and McLaren S.J. Multiple phases of North African humidity recorded in lacustrine sediments from the Fazzan Basin, Libyan Sahara. Quaternary Geochronology 2 (2007) 181-186
3. Arnold L.J., Bailey R.M., and Tucker G.E. Statistical treatment of fluvial dose distributions from southern Colorado arroyo deposits. Quaternary Geochronology 2 (2007) 162-167
4. Bailey, D.J.E., 2008. Development of LM OSL Analysis Techniques for Applications to Optical Dating. Unpublished DPhil thesis, University of Oxford.
5. Bailey R.M., Singarayer J.S., Ward S., and Stokes S. Identification of partial resetting using De as a function of illumination time. Radiation Measurements 37 (2003) 511-518
6. Bailey R.M., and Arnold L.J. Statistical modelling of single grain quartz De distributions and an assessment of procedures for estimating burial dose. Quaternary Science Reviews 25 (2006) 2475-2502
7. Barker P., and Gasse F. New evidence for a reduced water balance in East Africa during the Last Glacial Maximum: implication for model-data comparison. Quaternary Science Reviews 22 (2003) 823-837
8. Barker P.A., Leng M.J., Gasse F., and Huang Y. Century-to-millennial scale climatic variability in Lake Malawi revealed by isotope records. Earth and Planetary Science Letters 261 (2007) 93-103
9. Bateman M.D., Boulter C.H., Carr A.S., Frederick C.D., Peter D., and Wilder M. Preserving the palaeoenvironmental record in drylands: bioturbation and its significance for luminescence-derived chronologies. Sedimentary Geology 195 (2007) 5-19
10. Bateman M.D., Boulter C.H., Carr A.S., Frederick C.D., Peter D., and Wilder M. Detecting post-depositional sediment disturbance in sandy deposits using optical luminescence. Quaternary Geochronology 2 (2007) 57-64
11. Beekman H.E., Selaolo E.T., and de Vries J.J. Groundwater Recharge and Resources Assessment in the Botswana Kalahari: Executive Summary GRES II (1999), Faculty of Earth Sciences, Vrije Universiteit, Amsterdam Geological Survey of Botswana
12. Berger A., and Loutre M.F. Insolation values for the climate of the last 10 million years. Quaternary Science Reviews 10 (1991) 297-317
13. Bhalotra, Y.P.R., 1987. Climate of Botswana, Part II: Elements of Climate. Gaborone, Meteorological services, MWTC.
14. Botter-Jensen L. Luminescence techniques: instrumentation and methods. Radiation Measurements 27 (1997) 749-768
15. Botter-Jensen L., Mejdahl V., and Murray A.S. New light on OSL. Quaternary Science Reviews 18 (1999) 303-309
16. Botter-Jensen L., Bulur E., Duller G.A.T., and Murray A.S. Advances in luminescence instrument systems. Radiation Measurements 32 (2000) 523-528
17. Botter-Jensen, L., Bulur, E., Murray, A.S., Poolton, N.R.J., 2002. Enhancements in luminescence measurement techniques. Radiation Protection Dosimetry 101, 119-124.
18. Botter-Jensen, L., Andersen, C.E., Duller, G.A.T., Murray, A.S., 2003. Developments in radiation, stimulation and observation facilities in luminescence measurements. Radiation Measurements 37, 535-541.
19. Brandt R. Comparing classical and resistant outlier rules. Journal of American Statistics Association 85 (1990) 1083-1090
20. Bray, H., 2004. The Late Quaternary Palaeoenvironments of the southeastern Rub Al Khali. Unpublished Ph.D. thesis, University of Oxford.
21. Brook G.A., Cowart J.B., and Brandt S.A. Comparison of Quaternary environmental change in eastern and southern Africa using cave speleothem, tufa and rock shelter sediment data. In: Alsharhan G., Whittle, and Kendall (Eds). Quaternary Deserts and Climate Change (1998), Balkema, Rotterdam 239-250
22. Brook, G.A., Srivastava, P., Marais, E., 2006. Characteristics and OSL minimum ages of relict fluvial deposits near Sossus Vlei, Tsauchab River, Namibia, and a regional climate record for the last 30 ka. Journal of Quaternary Science 21, 347-362.
23. Brook G.A., Marais E., Srivastava P., and Jordan T. Timing of lake-level changes in Etosha Pan, Namibia, since the middle Holocene from OSL ages of relict shorelines in the Okondeka region. Quaternary International 175 (2007) 29-40
24. Burrough, S.L., 2007. Late Quaternary Palaeolacustrine Environments of the Middle Kalahari. DPhil thesis. School of Geography and the Environment. Oxford, University of Oxford, pp. 375.
25. Burrough S.L., Thomas D.S.G., Shaw P.A., and Bailey R.M. Multiphase Quaternary highstands at Lake Ngami, Kalahari, northern Botswana. Palaeogeography, Palaeoclimatology, Palaeoecology 253 (2007) 280-299
26. Burrough S.L., and Thomas D.S.G. Late Quaternary lake-level fluctuations in the Mababe Depression: middle Kalahari palaeolakes and the role of Zambezi inflows. Quaternary Research 69 (2008) 388-403
27. Burrough, S.L., Thomas, D.S.G., Singarayer, J., Eckardt, F. Changing hydrological landscapes of the middle Kalahari: a Quaternary perspective. Earth Science Reviews, submitted for publication.
28. Butzer K.W., Brown F.H., and Thurber D.L. Horizontal sediments of the lower Omo Valley: the Kibish Formation. Quaternaria 11 (1969) 15-29
29. Causse, C., 1989. Two high levels of continental waters in the southern Tunisian chotts at about 90 and 150 ka. Geology 17, 922-925.
30. Causse C., Ghaleb B., Chkir N., Zouari K., Ouezdou H.B., and Mamou A. Humidity changes in southern Tunisia during the Late Pleistocene inferred from U-Th dating of mollusc shells. Applied Geochemistry 18 (2003) 1691-1703
31. Chase B.M., and Thomas D.S.G. Multiphase late Quaternary aeolian sediment accumulation in western South Africa: timing and relationship to palaeoclimatic changes inferred from the marine record. Quaternary International 166 (2007) 29-41
32. Churcher, C.S., Mills, A., 1999. Reports from the Survey of the Dakhleh Oasis, Western Desert of Egypt 1977-1987.
33. Cooke H.J. Landform evolution in the context of climatic change and neo- tectonism in the middle Kalahari of north-central Botswana. Transactions, Institute of British Geographers 5 (1980) 80-99
34. Cooke H.J., and Verstappen T.H. The landforms of the western Makgadikgadi basin in northern Botswana, with a consideration of the chronology of the evolution of Lake Palaeo-Makgadikgadi. Zeitschrift Fur Geomorphologie 28 (1984) 1-19
35. Damnati B. Holocene lake records in the Northern Hemisphere of Africa. Journal of African Earth Sciences 31 (2000) 253-262
36. David B., Roberts R.G., Magee J., Mialanes J., Turney C., Bird M., White C., Fifiels L.K., and Tibby J. Sediment mixing at Nonda Rock: investigations of stratigraphic integrity at an early archaeological site in northern Australia and implications for the human colonisation of the continent. Journal of Quaternary Science 22 (2007) 449-479
37. Deacon H.J., and Lancaster N. Late Quaternary Palaeoenvironments of Southern Africa (1988), Clarendon Press, Oxford
38. Duller G.A.T. Distinguishing quartz and feldspar in single grain luminescence measurements. Radiation Measurements 37 (2003) 161-165
39. Dupont L., and Behling H. Land-sea linkages during deglaciation: high-resolution records from the eastern Atlantic off the coast of Namibia and Angola (ODP site 1078). Quaternary International 148 (2006) 19-28
40. Folk R.L., and Ward W.C. Brazos River bar: a study in the significance of grain size parameters. Journal of Sedimentary Petrology 27 (1957) 3-26
41. Galbraith R.F. Radial plots: graphical assessment of spread in ages. Nuclear Tracks and Radiation Measurements 17 (1990) 207-214
42. Galbraith R.F., and Green P.F. Estimating the component ages in a finite mixture. Nuclear Tracks and Radiation Measurements 17 (1990) 197-206
43. Galbraith R.F., Roberts R.G., Laslett G.M., Yoshida H., and Olley J.M. Optical dating of single and multiple grains of quartz from jinmium rock shelter, northern Australia, part 1, Experimental design and statistical models. Archaeometry 41 (1999) 339-364
44. Galbraith R.F., Roberts R.G., and Yoshida H. Error variation in OSL palaeodose estimates from single aliquots of quartz: a factorial experiment. Radiation Measurements 39 (2005) 289-307
45. Gasse F. Hydrological changes in the African tropics since the Last Glacial Maximum. Quaternary Science Reviews 19 (2000) 189-211
46. Gasse F., and Van Campo E. Late Quaternary environmental changes from a pollen and diatom record in the southern tropics (Lake Tritrivakely, Madagascar). Palaeogeography, Palaeoclimatology, Palaeoecology 167 (2001) 287-308
47. Gaven C., Hillaire-Marcel C., and Petit-Maire N. A Pleistocene lacustrine episode in southeastern Libya. Nature 290 (1981) 131-133
48. Grey D.R.C., and Cooke H.J. Some problems in the Quaternary evolution of the landforms of northern Botswana. Catena 4 (1977) 123-133
49. Grine F.E., Bailey R.M., Harvati K., Nathan R.P., Morris A.G., Henderson G.M., Ribot I., and Pike A.W.G. Late pleistocene human skull from Hofmeyr, South Africa, and modern human origins. Science 315 (2007) 226-229
50. Grove A.T. Landforms and climatic change in the Kalahari and Ngamiland. Geographical Journal 135 (1969) 191-212
51. Gumbricht T., McCarthy T.S., and Merry C.L. The topography of the Okavango Delta, Botswana, and its tectonic and sedimentological implications. South African Journal of Geology 104 (2001) 243-264
52. Hamdan M.A. Quaternary travertines of Wadis Abu Had-dib area Eastern Desert, Egypt: paleoenvironment through field, sedimentology, age, and isotopic study. Sedimentology of Egypt 8 (2000) 49-62
53. Heine K. Radiocarbon chronology of the late Quaternary lakes in the Kalahari. Catena 5 (1978) 145-149
54. Heiri O., Lotter A.F., and Lemcke G. Loss on ignition as a method for estimating organic and carbonate content in sediments: reproducibility and comparability of results. Journal of Paleolimnology 25 (2001) 101-110
55. Helgren D.M. Historical geomorphology and geoarchaeology in the Southwestern Makgadikgadi Basin, Botswana. Annals of the Association of American Geographers 74 (1984) 298-307
56. Hillaire-Marcel C., Carro O., and Casanova J. 14C and Th/U dating of Pleistocene and Holocene stromatolites from East African paleolakes. Quaternary Research 25 (1986) 312-329
57. Holmgren K., Lee-Thorp J.A., Cooper G.R.J., Lundblad K., Partridge T.C., Scott L., Sithaldeen R., Talma A.S., and Tyson P.D. Persistent millennial-scale climatic variability over the past 25,000 years in Southern Africa. Quaternary Science Reviews 22 (2003) 2311-2326
58. Huntley D.J., Godfrey-Smith D.I., and Thewalt M.L.W. Optical dating of sediments. Nature 313 (1985) 105-107
59. Huntsman-Mapila P., Ringrose S., Mackay A.W., Downey W.S., Modisi M., Coetzee S.H., Tiercelin J.-J., Kampunzu A.B., and Vanderpost C. Use of the geochemical and biological sedimentary record in establishing palaeo-environments and climate change in the Lake Ngami basin, NW Botswana. Quaternary International 148 (2006) 51-64
60. Jouzel J. EPICA Dome C Ice Cores Deuterium Data. 2004-038, D.C.S (2004), IGBP PAGES/World Data Center for Paleoclimatology, Boulder, CO, USA NOAA/NGDC Paleoclimatology Program
61. Lamb H.F., Bates C.R., Coombes P.V., Marshall M.H., Umer M., Davies S.J., and Dejen E. Late Pleistocene desiccation of Lake Tana, source of the Blue Nile. Quaternary Science Reviews 26 (2007) 287-299
62. Madsen A.T., Murray A.S., Andersen T.J., and Pejrup M. Optical dating of young tidal sediments in the Danish Wadden Sea. Quaternary Geochronology 2 (2007) 89-94
63. Mallick D.I.J., Habgood F., and Skinner A.C. A geological interpretation of Landsat imagery and air photography of Botswana. Overseas Geology & Mineral Resources 56 (1981)
64. Marret F., Scourse J.D., Versteegh G., Jansen J.H.F., and Schneider R. Integrated marine and terrestrial evidence for abrupt Congo River palaeodischarge fluctuations during the last deglaciation. Journal of Quaternary Science 16 (2001) 761-766
65. Mazvimavi D., and Wolski P. Long-term variations of annual flows of the Okavango and Zambezi Rivers. Physics and Chemistry of the Earth 31 (2006) 944-951
66. McCarthy T., and Rubidge B. The Story of Earth and Life: a Southern African Perspective on a 4.6-billion-year Journey (2007), Struik, Cape Town, South Africa
67. McFarlane M.J., and Segadika P. Archaeological evidence for the reassessment of the ages of the Makgadikgadi palaeolakes. Botswana Notes and Records 33 (2001) 83-92
68. Mejdahl V. Thermoluminescence dating: beta-dose attenuation in quartz grains. Archaeometry 21 (1979) 61-72
69. Moore A.E., and Larkin P.A. Drainage evolution in south-central Africa since the breakup of Gondwana. South African Journal of Geology 104 (2001) 47-68
70. Moore J.K., Abbott M.R., and Richman J.G. Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data. Journal of Geophysical Research C 104 (1999) 3059-3073
71. Munyikwa K. Cosmic ray contribution to environmental dose rates with varying overburden thickness. Ancient TL 18 2 (2000) 27-34
72. Murray A.S., and Roberts R.G. Determining the burial time of single grains of quartz using optically stimulated luminescence. Earth and Planetary Science Letters 152 (1997) 163-180
73. Murray A.S., and Wintle A.G. Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol. Radiation Measurements 32 (2000) 57-73
74. Murray A.S., and Wintle A.G. The single aliquot regenerative dose protocol: potential for improvements in reliability. Radiation Measurements 37 (2003) 377-381
75. Nash D.J., Meadows M.E., and Gulliver V.L. Holocene environmental change in the Okavango Panhandle, northwest Botswana. Quaternary Science Reviews 25 (2006) 1302-1322
76. Nathan R.P., Thomas P.J., Jain M., Murray A.S., and Rhodes E.J. Environmental dose rate heterogeneity of beta radiation and its implications for luminescence dating: Monte Carlo modelling and experimental validation. Radiation Measurements 37 (2003) 305-313
77. Nielsen A., Murray A.S., Pejrup M., and Elberling B. Optically stimulated luminescence dating of a Holocene beach ridge plain in Northern Jutland, Denmark. Quaternary Geochronology 1 (2006) 305-312
78. Olley J., Caitcheon G., and Murray A. The distribution of apparent dose as determined by optically stimulated luminescence in small aliquots of fluvial quartz: implications for dating young sediments. Quaternary Science Reviews 17 (1998) 1033-1040
79. Olley J.M., Murray A., and Roberts R.G. The effects of disequilibria in the uranium and thorium decay chains on burial dose rates in fluvial sediments. Quaternary Science Reviews 15 (1996) 751-760
80. Otvos E.G. Beach ridges - definitions and significance. Geomorphology 32 (2000) 83-108
81. Partridge T.C., deMenocal P.B., Lorentz S.A., Paiker M.J., and Vogel J.C. Orbital forcing of climate over South Africa: a 200,000-year rainfall record from the Pretoria Saltpan. Quaternary Science Reviews 16 (1997) 1125-1133
82. Partridge T.C., Scott L., and Schneider R. Between Agulhas and Benguela: responses of southern African climates of the Late Pleistocene to current fluxes, orbital precession and the extent of the circum-Antarctic vortex. In: Battarbee R.W., Gasse F., and Stickley C.E. (Eds). Past Climate Variability through Europe and Africa vol. 6 (2004), Springer, Dordrecht 45-67
83. Petit-Maire N. Recent quaternary climatic change and man in Sahara. L'arte E L'ambiente Preistorico: Dati E Interpretazioni 26 (1993) 411-416
84. Prescott J.R., and Hutton J.T. Cosmic ray contributions to dose rates for luminescence and ESR dating: large depths and long-term variations. Radiation Measurements 23 (1994) 497-500
85. Reeves C.V. Rifting in the Kalahari?. Nature 237 (1972) 95-96
86. Ringrose S., Downey B., Genecke D., Sefe F., and Vink B. Nature of sedimentary deposits in the western Makgadikgadi basin, Botswana. Journal of Arid Environments 43 (1999) 375-397
87. Ringrose S., Huntsman-Mapila P., Kampunzu A.B., Downey W., Coetzee S., Vink B., Matheson W., and Vanderpost C. Sedimentological and geochemical evidence for palaeo-environmental change in the Makgadikgadi subbasin, in relation to the MOZ rift depression, Botswana. Palaeogeography, Palaeoclimatology, Palaeoecology 217 (2005) 265-287
88. Robbins L.H., Murphy M.L., Brook G.A., Iverster A.H., Campbell A.C., Klein R.G., Milo R.G., Stewart K.M., Downey W.S., and Stevens N.H. Archaeology, palaeoenvironment, and chronology of the Tsodilo Hills white paintings rock shelter, Northwest Kalahari Desert, Botswana. Journal of Archaeological Science 27 (2000) 1085-1113
89. Roberts H.M., and Plater A.J. Reconstruction of Holocene foreland progradation using optically stimulated luminescence (OSL) dating: an example from Dungeness, UK. Holocene 17 (2007) 495-505
90. Schefuß E., Schouten S., and Schneider R.R. Climatic controls on central African hydrology during the past 20,000 years. Nature 437 (2005) 1003-1006
91. Scholz C.A., Johnson T.C., Cohen A.S., King J.W., Peck J.A., Overpeck J.T., Talbot M.R., Brown E.T., Kallndekafe L., Amoako P.Y.O., and Lyons R.P. East African megadroughts between 135 and 75 thousand years ago and bearing on early-modern human origins. Proceedings of the National Academy of Sciences 104 (2007) 16416-16421
92. Shaw P., and Thomas D.S.G. Lake Caprivi: a late Quaternary link between the Zambezi and middle Kalahari drainage systems. Zeitschrift Fur Geomorphologie 32 (1988) 329-337
93. Shaw P.A., Thomas D.S.G., and Nash D.J. Late Quaternary fluvial activity in the dry valleys (mekgacha) of the middle and southern Kalahari, southern Africa. Journal of Quaternary Science 7 (1992) 273-281
94. Shaw P.A., and Thomas D.S.G. The Quaternary palaeoenvironmental history of the Kalahari, Southern Africa. Journal of Arid Environments 32 (1996) 9-22
95. Shaw P.A., Stokes S., Thomas D.S.G., Davies F.B.M., and Holmgren K. Palaeoecology and age of a Quaternary high lake level in the Makgadikgadi basin of the middle Kalahari, Botswana. South African Journal of Science 93 (1997) 273-276
96. Shaw P.A., Bateman M.D., Thomas D.S.G., and Davies F. Holocene fluctuations of Lake Ngami, Middle Kalahari: chronology and responses to climatic change. Quaternary International 111 (2003) 23-35
97. Shi, N., Dupont, L.M., Beug, H.-J., Schneider, R., 1998. Vegetation and climate changes during the last 21,000 years in S.W. Africa based on a marine pollen record. Vegetation History and Archaeobotany 7, 127-140.
98. Shi N., Schneider R., Beug H.-J., and Dupont L.M. Southeast trade wind variations during the last 135 kyr: evidence from pollen spectra in eastern South Atlantic sediments. Earth and Planetary Science Letters 187 (2001) 311-321
99. Smith J.R., Giegengack R., and Schwarcz H.P. Constraints on Pleistocene pluvial climates through stable-isotope analysis of fossil-spring tufas and associated gastropods, Kharga Oasis, Egypt. Palaeogeography, Palaeoclimatology, Palaeoecology 206 (2004) 157-175
100. Stansfield G. The geology of the area around Dukwe and Tlalamabele, Central District, Botswana. Geological Survey of Botswana District Memoir 1 (1973)
101. Stokes S., Thomas D.S.G., and Washington R. Multiple episodes of aridity in southern Africa since the last interglacial period. Nature 388 (1997) 154-158
102. Stokes S., Bailey R.M., Fedoroff N., and O'Marah K.E. Optical dating of aeolian dynamism on the West African Sahelian margin. Geomorphology 59 (2004) 281-291
103. Szabo B.J., Haynes J.C.V., and Maxwell T.A. Ages of Quaternary pluvial episodes determined by uranium-series and radiocarbon dating of lacustrine deposits of Eastern Sahara. Palaeogeography, Palaeoclimatology, Palaeoecology 113 (1995) 227-242
104. Taylor B.N., and Kuyatt C.E. NIST Technical Note 1297: Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results (1994), Administration, U.S.D. o. C.T. Gaithersburg, Physics Laboratory, NIST (National Institute of Standards and Technology) pp. 1-20
105. Telfer M.W., and Thomas D.S.G. Complex Holocene lunette dune development, South Africa: implications for paleoclimate and models of pan development in arid regions. Geology 34 (2006) 853-856
106. Thomas D.S.G. Ancient ergs of the former arid zones of Zimbabwe, Zambia and Angola. Transactions of the Institute of British Geographers 9 (1984) 75-88
107. Thomas D.S.G., and Shaw P.A. The Kalahari Environment (1991), Cambridge University Press, Cambridge
108. Thomas D.S.G., and Shaw P.A. The Zambezi River: tectonism, climatic change and drainage evolution: is there really evidence for a catastrophic flood? A discussion. Palaeogeography, Palaeoclimatology, Palaeoecology 91 (1992) 175-178
109. Thomas D.S.G., O'Connor P.W., Bateman M.D., Shaw P.A., Stokes S., and Nash D.J. Dune activity as a record of late Quaternary aridity in the Northern Kalahari: new evidence from northern Namibia interpreted in the context of regional arid and humid chronologies. Palaeogeography, Palaeoclimatology, Palaeoecology 156 (2000) 243-259
110. Thomas D.S.G., Brook G., Shaw P., Bateman M., Haberyan K., Appleton C., Nash D., McLaren S., and Davies F. Late Pleistocene wetting and drying in the NW Kalahari: an integrated study from the Tsodilo Hills, Botswana. Quaternary International 104 (2003) 53-67
111. Thomas D.S.G., Bailey R.M., Shaw P.A., Durcan J., and Singarayer J.S. Late Quaternary highstands at Lake Chilwa, Malawi: frequency, timing and possible forcing mechanisms in the last 44 ka. Quaternary Science Reviews 28 (2009) 526-537
112. Thomas M.F. Landscape sensitivity to rapid environmental change: a Quaternary perspective with examples from tropical areas. Catena 55 (2004) 107-124
113. Trauth M.H., Deino A.L., Bergner A.G.N., and Strecker M.R. East African climate change and orbital forcing during the last 175 kyr BP. Earth and Planetary Science Letters 206 (2003) 297-313
114. Tyson P.D. Climatic Change and Variability in Southern Africa (1986), Oxford University Press, Cape Town
115. UNDP/FAO, 1977. Investigation of the Okavango Delta as a Primary Water Resource for Botswana. DP/Bot/71/506 Technical report 3.
116. Weisberg S. Probability and Mathematical Statistics: Applied Linear Regression (1985), John Wiley and Sons, New York
117. Williams M., Talbot M., Aharon P., Abdl Salaam Y., Williams F., and Inge Brendeland K. Abrupt return of the summer monsoon 15,000 years ago: new supporting evidence from the lower White Nile valley and Lake Albert. Quaternary Science Reviews 25 (2006) 2651-2665
118. Wintle A.G., and Murray A.S. A review of quartz optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration dating protocols. Radiation Measurements 41 (2006) 369-391
119. Wood W.W., Eckardt F., Kraemer T.F., and Eng K. Quantitative eolian transport of evaporate salts from the Makgadikgadi depression (Ntwetwe and Sua pans) in northeastern Botswana. implications for regional ground water quality. In: Barth H.-J., and Boer B. (Eds). Sabka Ecosystems. Africa vol. 3 (2005), Kluwer, Dordrect