Effects of Holocene Climatic Change on some Tropical Geomorphic Processes | Quaternary Research | Cambridge Core (original) (raw)

Abstract

Man's interference with the landscape process places him in the role of a “paraglacial” agent: He tends to duplicate ice-age stresses such as deforestation, accelerated erosion, and climate alteration. Against a background climatic control dictated by the Milankovich mechanisms, the 10,000-year history of the Holocene has seen very large secondary modulations that must be better understood so that they may be distinguished from anthropogenic effects. If they are exogenetically controlled, as it seems, then they are probably predictable from astronomic data. Four geomorphic type areas are selected for demonstrating Holocene changes in tropical regions, because they have been somewhat neglected within the framework of Quaternary science and because they include some of the most fragile and easily disrupted environments: lakes, semiarid desert margins, coastlines, and coral reefs. In a nutshell, the tropical Holocene has seen three major changes: (a) the evolution from the hyperaridity of the last pleniglacial stage to the “postglacial pluvial”; (b) the “climatic optimum,” which was highly diachronous and strongly retarded as it shifted from low latitudes to high; (c) the postoptimum “deterioration” that has involved desiccation of lakes, readvances of the deserts, fall of sea level, and truncation of coral reefs. While this deterioration is predictable in terms of an interglacial-glacial climatic transition, strong natural climatic oscillations, not yet well understood, together with man's activities, make the future a cause for concern.

References

Balout, L., ((1952)). Pluviaux interglaciaires et Prehistorie saharienne. Travaux Institut Recherches Sahariennes 8 9–21.Google Scholar

Beaty, C.B., ((1971)). Climatic change: some doubts. Geological Society of America Bulletin 82 1395–1398.CrossRefGoogle Scholar

Bell, B., ((1975)). Climate and the history of Egypt: The Middle Kingdom. American Journal of Archeology 79 223–269.CrossRefGoogle Scholar

Berglund, B., ((1971)). Littorina transgressions in Blekinge, South Sweden. Geologiska Föreningens Förhandlingar 92 625–652.CrossRefGoogle Scholar

Berry, L., Whiteman, A.J., ((1968)). The Nile in the Sudan. Geographical Journal 134 1–37.CrossRefGoogle Scholar

Bigarella, J.J., de Andrade, G.O., ((1965)). Contributions to the study of the Brazilian Quaternary. Wright, H.E., Frey, D.G., International Studies on the Quaternary Geological Society of America, Special Paper No. 84 433–451.CrossRefGoogle Scholar

Bloom, A.L., ((1970)). Holocene submergence in Micronesia as the standard for eustatic sea-level changes. Quaternaria 12 145–154.Google Scholar

Bloom, A.L., ((1971)). Glacio-eustatic and isostatic controls of sea level since the last glaciation. Turekian, K.K., Late Cenozoic Glacial Ages Yale University Press New Haven, Conn 355–379.Google Scholar

Bloom, A.L., ((1974)). Geomorphology of reef complexes. Laporte, L.F., Reefs in Time and Space Society of Economic Paleontologists and Mineralogists, Special Publication No. 18 .CrossRefGoogle Scholar

Booth, N.A., ((1957)). The Niger, the Volta and the Dahomey Gap as geographic barriers. Evolution 12 48–62.CrossRefGoogle Scholar

Bourdier, F., ((1971)). Les anciens rivages quaternaires en France. Théories et réalités. Quaternaria 15 105–110.Google Scholar

Bowler, J.M., ((1975)). Deglacial events in southern Australia: their age, nature, and paleoclimatic significance. Royal Society of New Zealand, Bulletin 13 75–82.Google Scholar

Bray, J.R., ((1974)). Glacial advance relative to volcanic activity since 1500 AD. Nature (London) 248 42–43.CrossRefGoogle Scholar

Bryson, R.A., ((1976)). Some cultural and economic consequences of climatic change. Melbourne Climatic Conference Cambridge University Press Melbournein press.Google Scholar

Bull, C., Webb, P.N., ((1973)). Some recent developments in the investigation of the glacial history and glaciology of Antarctica. Van Zinderen Bakker, E.M., Paleocology of Africa Vol. 8 Balkema Capetown 55–84.Google Scholar

Burrows, C.J., ((1975)). Late Pleistocene and Holocene moraines of the Cameron Valley, Arrowsmith Range, Canterbury, New Zealand. Arctic and Alpine Research 7 125–140.CrossRefGoogle Scholar

Butzer, K.W., Helgren, D.M., ((1972)). Late Cenozoic evolution of the Cape coast between Knysna and Cape St. Francis, South Africa. Quaternary Research 2 143–169.CrossRefGoogle Scholar

Butzer, K.W., Isaac, G.L., Richardson, J.L., Washbourn-Kamau, C., ((1972)). Radiocarbon dating of East African lake levels. Science 175 1069–1076.CrossRefGoogle ScholarPubMed

Claiborne, R., ((1970)). Climate, Man and History. Norton New York.Google Scholar

Coque, R., Dresch, J., Rognon, P., ((1972)). Géomorphologie et Quaternaire des régions arides. Recherches géographiques en France Congrès Géographique International Montreal 107–117Chapter 12.Google Scholar

Costin, A.B., Thom, B.G., Wimbush, D.J., Stuiver, M., ((1967)). Nonsorted steps in the Mt. Kosciusko area, Australia. Geological Society of America Bulletin 78 979–992.CrossRefGoogle Scholar

Creer, K.M., Gross, D.L., Lineback, J.A., ((1976)). Origin of regional geomagnetic variations recorded by Wisconsinan and Holocene sediments from Lake Michigan, U. S. A., and Lake Windermere, England. Geological Society of America Bulletin 87 531–540.2.0.CO;2>CrossRefGoogle Scholar

Daly, R.A., ((1915)). The glacial control theory of coral reefs. Proceedings of the American Academy of Arts and Sciences 51 157–251.CrossRefGoogle Scholar

Damuth, J.E., Fairbridge, R.W., ((1970)). Equatorial Atlantic deep-sea arkosic sands and ice-age aridity in tropical South America. Geological Society of America Bulletin 81 189–206.CrossRefGoogle Scholar

Dansgaard, W., Johnson, S.J., Clausen, H.B., Langway, C.C., ((1971)). Climatic record revealed by Camp Century ice core. Turekian, K.K., Late Cenozoic Glacial Ages Yale University Press New Haven, Conn 37–56.Google Scholar

Darwin, C., ((1838)). On certain areas of elevation and subsidence in the Pacific and Indian Oceans, as deduced from the study of coral formation. Proceedings Geological Society London 2 552–554.Google Scholar

David, T.W., Sweet, G., ((1904)). The geology of Funafuti. The Atoll of Funafuti Royal Society London, Coral Reef Committee Report 61–111.Google Scholar

Davies, O., ((1972)). Pleistocene shorelines in southern and southeastern Cape Province. Annals Natal Museum 21 225–279.Google Scholar

de Jong, J.D., ((1967)). The Quaternary of the Netherlands. Rankama, K., The Quaternary Vol. 2 Interscience New York 301–426.Google Scholar

Delibrias, G., Dutil, P., ((1966)). Formations calcaire lacustres du Quaternaire supérieur dans le massif central saharien (Hoggar) et datations absolues. Comptes Rendus Academie Sciences, Paris 262 55–58.Google Scholar

Delibrias, G., Laborel, J., ((1971)). Recent variations of the sea level along the Brazilian coast. Quaternaria 14 45–49.Google Scholar

Denton, G.H., Karlén, W., ((1973)). Holocene climatic variations: their pattern and possible cause. Quaternary Research 3 155–205.CrossRefGoogle Scholar

de Ploey, J., ((1965)). Position géomorphologique, genèse et chronologie de certains depôts superficiels au Congo occidental. Quaternaria 7 131–154.Google Scholar

Diester-Haas, L., ((1976)). Late Quaternary climatic variations in northwest Africa from east Atlantic sediment cores. Quaternary Research 6 299–314.CrossRefGoogle Scholar

Deuser, W.G., Ross, E.H., Waterman, L.S., ((1976)). Glacial and pluvial periods: Their relationship revealed by Pleistocene sediments of the Red Sea and Gulf of Aden. Science 191 1168–1170.CrossRefGoogle ScholarPubMed

Easton, W.H., Olson, E.A., ((1976)). Radiocarbon profile of Hanauma Reef, Oahu, Hawaii. Geological Society America Bulletin 87 711–719.2.0.CO;2>CrossRefGoogle Scholar

Einsele, G., Herm, D., Schwarz, H.U., ((1974)). Sea level fluctuation during the past 6000 yr at the coast of Mauritania. Quaternary Research 4 282–289.CrossRefGoogle Scholar

Ente, P.J., Zagwijn, W.H., Mook, W.G., ((1975)). The Calais deposits in the vicinity of Wieringen and the geogenesis of northern North Holland. Geologie en Mijnbouw 54 1–14.Google Scholar

Erhart, H., ((1956)). La Genèse des Sols. Esquisse d'une Théorie Géologique: Biostasie et Rhexistasie. Masson Paris.Google Scholar

Eronen, M., ((1974)). The history of the Litorina Sea and associated Holocene events. Commentationes Physico-Mathematicae (Fennica) 44 79–195.Google Scholar

Fairbridge, R.W., ((1950)). The geology and geomorphology of Point Peron, Western Australia. Journal of the Royal Society Western Australia 34 35–72.Google Scholar

Fairbridge, R.W., 1961a. Convergence of evidence on climatic change and ice ages. Annals New York Academy of Sciences 95 542–579.CrossRefGoogle Scholar

Fairbridge, R.W., 1961b. Eustatic changes in sea-level. Ahrens, L.H., Press, F., Rankama, K., Runcorn, S.K., Physics and Chemistry of the Earth Vol. 4 Pergamon London 99–185.CrossRefGoogle Scholar

Fairbridge, R.W., ((1962)). New radiocarbon dates of Nile sediments. Nature: (London) 196 108–110.CrossRefGoogle Scholar

Fairbridge, R.W., 1963a. Nile sedimentation above Wadi-Halfa during the last 20,000 years. Kush (Khartoum) 11 96–107.Google Scholar

Fairbridge, R.W., 1963b. Mean sea level related to solar radiation during the last 20,000 years. Changes of Climate Proceedings, Rome Symposium, 1960 UNESCO Paris 229–242.Google Scholar

Fairbridge, R.W., ((1968)). The Encyclopedia of Geomorphology. Reinhold New York.Google Scholar

Fairbridge, R.W., ((1971)). Quaternary shoreline problems at INQUA 1969. Quaternaria 15 1–18.Google Scholar

Fairbridge, R.W., 1972b. Quaternary sedimentation in the Mediterranean region controlled by tectonics, paleoclimates and sea level. Stanley, D.J., The Mediterranean Sea Dowden, Hutchinson and Ross Stroudsburg, Pa 99–113.Google Scholar

Fairbridge, R.W., Teichert, C., ((1953)). Soil horizons and marine bands in the coastal limestones of Western Australia. Royal Society New South Wales, Journal and Proceedings 86 68–87.CrossRefGoogle Scholar

Faure, H., ((1966)). Evolution des grands lacs sahariens à l'Holocene. Quaternaria 8 167–175.Google Scholar

Faure, H., Nanguin, E., Nydal, R., ((1963)). Formations lacustres du Quaternaire superieur du Niger oriental: diatomites et ages absolus. Bulletin Bureau Recherches Geologiques Minieres 3 41–63.Google Scholar

Flint, R.F., ((1971)). Glacial and Quaternary Geology. Wiley New York.Google Scholar

Flohn, H., ((1953)). Studien über die atmosphärische Zirkulation in der letzten Eiszeit. Erdkunde 7 266–275.CrossRefGoogle Scholar

Flohn, M., ((1974)). Background of a geological model of the initiation of the next glaciation. Quaternary Research 4 385–404.CrossRefGoogle Scholar

Florin, S., ((1944)). Harstrandens förskjutningar och bebyggelseutvecklingen i östra Mellansverige under senkvartär tid. Geologiska Föreningens Förhandlingar 66 551–634.CrossRefGoogle Scholar

Frenzel, B., ((1973)). Climatic Fluctuations of the Ice Age. Western Reserve University Press Clevelandtranslation of “Die Klimaschwankungen des Eiszeitalters” (A.E.M. Nairn, Tr.).Google Scholar

Galloway, R.W., ((1970)). The full-glacial climate in the southwestern United States. Association American Geographers Annals 60 245–256.CrossRefGoogle Scholar

Gasse, F., Fontes, J.C., Rognon, P., ((1974)). Variations hydrologiques et extension des lacs Holocènes du Desert Danakil. Palaeogeography, Palaeoclimatology, Palaeoecology 15 109–148.CrossRefGoogle Scholar

Geyh, M.A., ((1969)). Versuch einer chronologischen Gliedering des marinen Holozäns an der Nordseeküste mit Hilfe der statistischen Auswertung von 14C-Daten. Zeitschrift Deutschen Geologischen Gesellschaft 118 351–360.CrossRefGoogle Scholar

Geyh, M.A., ((1971)). Middle and young Holocene sea-level changes as global contemporary events. Geologiska Föreningens Förhandlingar 93 679–692.CrossRefGoogle Scholar

Geyh, M.A., Jäkel, D., ((1974)). Spätpleistozäne und holozäne Klimageschichte der Sahara aufgrund zugänglicher 14C-Daten. Zeitschrift für Geomorphologie, N.F. 18 82–98.CrossRefGoogle Scholar

Gill, E., ((1970)). Coast and continental shelf of Australia. Quaternaria 12 115–128.Google Scholar

Greensmith, J.T., Tucker, E.V., ((1973)). Holocene transgressions and regression on the Essex coast Outer Thames estuary. Geologie en Mijnbouw 52 193.Google Scholar

Gribben, J., ((1973)). Planetary alignments, solar activity and climate change. Nature (London) 246 453–454.CrossRefGoogle Scholar

Grove, A.T., ((1969)). landforms and climatic change in the Kalahari and Ngamiland. Geographical Journal 135 191–212.CrossRefGoogle Scholar

Grove, A.T., ((1971)). 2nd ed. Africa South of the Sahara Oxford University Press London.Google Scholar

Grove, A.T., Pullan, R.A., ((1963)). Some aspects of the Pleistocene palaeogeography of the Chad basin. Howell, H.C., Bourliere, F., African Ecology and Human Evolution Viking Fund Publications in Anthropology Vol. 36 230–245.Google Scholar

Hageman, B.P., ((1969)). Development of the western part of the Netherlands during the Holocene. Geologie en Mijnbouw 48 373–388.Google Scholar

Hillaire-Marcel, C., ((1976)). Deglaciation et relèvement isostatique à l'est de la Baie d'Hudson. Cahiers de Géographie de Quebec to appear.Google Scholar

Hoffmeister, J.E., Ladd, H.S., ((1945)). Solution effects on elevated limestone terraces. Bulletin Geological Society America 56 809–817.CrossRefGoogle Scholar

Holdahl, S.R., Morrison, N.L., ((1974)). Regional investigations of vertical crustal movements in the U. S., using precise relevellings and mareograph data. Tectonophysics 23 373–390.CrossRefGoogle Scholar

Hoyanagi, M., ((1965)). Sand-buried ruins and shrinkage of rivers along the Old Silk Road region in the Tarim Basin. Journal of Geography (Tokyo Geographical Society) 74 1–12 Hoyanagi, M., Sand-buried ruins and shrinkage of rivers along the Old Silk Road region in the Tarim Basin Journal of Geography (Tokyo Geographical Society) 74 55–75.Google Scholar

Huntington, E., ((1915)). Civilization and Climate. 3rd rev. ed. 1924 Yale University Press New Haven, Conn.Google Scholar

Hurt, W.R., ((1974)). The interrelationships between the natural environment of Four Sambaquis, coast of Santa Catarina, Brazil. Occasional Papers No. 1 Indiana University Museum Bloomington, Ind.Google Scholar

Jardetzky, W.S., ((1962)). A periodic pole shift and deformation of the earth's crust. Journal of Geophysical Research 67 4461–4472.CrossRefGoogle Scholar

Jelgersma, S., de Jong, J., Zagwijn, W.H., Altena van Regteren, J.F., ((1970)). The coastal dunes of the western Netherlands; geology, vegetational history and archeology. Mededeelingen Rijks Geologische Dienst, N.S. 21 93–167.Google Scholar

Kendall, R.L., ((1969)). An ecological history of the Lake Victoria basin. Ecological Monographs 39 121–176.CrossRefGoogle Scholar

Kershaw, A.P., ((1975)). Late Quaternary vegetation and climate in northeastern Australia. Royal Society of New Zealand, Bulletin 13 181–188.Google Scholar

Labeyrie, J., Lalou, C., Delibrias, G., ((1969)). Études des transgressions marines sur l'atoll de Mururoa par la datation des differents niveaux de corail. Mururoa Direction de Centres d'Experimentations Nucleaires Paris 203–212.Google Scholar

Ladd, H.S., Newman, W.A., Sohl, N.F., ((1974)). Darwin Guyot, the Pacific's oldest atoll. Proceedings 2nd International Coral Reef Symposium Vol. 2 Great Barrier Reef Committee Brisbane.Google Scholar

Ladurie, E.L-R., ((1972)). Times of Feast, Times of Famine: A History of Climate Since the Year 1000. Allen and Unwin London.Google Scholar

Lamb, H.H., ((1969)). Climatic fluctuations. Flohn, H., World Survey of Climatology Vol. 2 Elsevier Amsterdam 173–249.Google Scholar

Lamb, H.H., ((1970)). Volcanic dust in the atmosphere; with a chronology and an assessment of its meteorological significance. Philosophical Transactions, Royal Society of London A 266 425–533.Google Scholar

Le Houérou, H.N., ((1970)). North Africa: past, present and future. Dregne, H., Arid Lands in Transition American Association Fourth Advancement of Science 277–278Washington, D.C..Google Scholar

Livingstone, D.A., ((1975)). Late Quaternary climate change in Africa. Annual Review of Ecology and Systematics 6 249–280.CrossRefGoogle Scholar

MacNeil, F.S., ((1954)). The shape of atolls: An inheritance from subaerial erosion forms. American Journal of Science 252 402–427.CrossRefGoogle Scholar

Maley, J., ((1973)). Méchanisme des changements climatiques aux basses latitudes. Palaeogeography, Palaeoclimatology, Palaeoecology 14 193–227.CrossRefGoogle Scholar

Martinussen, M., ((1962)). 14C-datings referring to shore lines, transgressions and glacial substages in northern Norway. Norges Geologiske Undersøkelse 215 37–67.Google Scholar

Mauny, R.A., ((1957)). Répartition de la grande faune éthiopienne du nordouest africain du Paleolithique à nos jours. Pan-African Congress, 3rd Chatto and Windus London 102–150.Google Scholar

McFadgen, B.G., ((1975)). Long-term cycles in the variation of atmospheric radiocarbon, related to changes in Holocene climate. Search 6 509–511.Google Scholar

Michel, P., ((1973)). Les bassins des fleuves Sénégal et Gambie. Étude morphologique. ORSTEM, Mémoirs Vol. 63 Paris.Google Scholar

Mörner, N.-A., ((1969)). The Late Quaternary history of the Kattegatt Sea and the Swedish West Coast. Deglaciation, shorelevel displacement, chronology, isostasy and eustasy. Sveriges Geologiska Undersökning C 640 487.Google Scholar

Mörner, N.-A., ((1976)). Eustatic changes during the last 8,000 years in view of radiocarbon calibration and new information from the Kattegatt region and other northwestern European areas. Palaeogeography Palaeoclimatology Palaeoecology 19 63–85.CrossRefGoogle Scholar

Mörner, N.-A., Rickard, D., ((1974)). Quantitative analysis of eustatic changes and climatic fluctuations. CNRS Colloque Internationale Vol. 219 142–153Paris.Google Scholar

Newell, N.D., Bloom, A.L., ((1970)). The reef flat and “two-meter eustatic terrace” of some Pacific atolls. Geological Society of America Bulletin 81 1881–1894.CrossRefGoogle Scholar

Olausson, E., Haq, B.U., Karlsson, G.B., Olsson, I.U., ((1971)). Evidence in Indian Ocean cores of late Pleistocene changes in oceanic and atmopsheric circulation. Geologiska Föreningens Förhandlinger 93 51–84.CrossRefGoogle Scholar

Parmenter, C., Folger, D.W., ((1974)). Eolian biogenic detritus in deep-sea sediments: A possible index of equatorial ice age aridity. Science 184 695–697.CrossRefGoogle Scholar

Pollard, M., ((1968)). Floods according to an ancient Egyptian scientific chronicle. Journal of Geophysical Research 73 7158–7159.CrossRefGoogle Scholar

Rapp, A., ((1974)). A Review of Desertization in Africa: Water, Vegetation and Man Secretariat for International Ecology, Report 1. Stockholm.Google Scholar

Richardson, J.L., Richardson, A.E., ((1972)). History of an African rift lake and its climatic implications. Ecological Monographs 42 499–534.CrossRefGoogle Scholar

Rhodenburg, H., ((1970)). Morphodynamische Aktivitäts-und Stabilitätszeiten statt Pluvialund Interpulvialzeiten. Eiszeitalter and Gegenwart 21 81–96.Google Scholar

Rudzinski, K., ((1973)). Human interference in the world's weather, water balance and climate?. Universitas 15 179–182.Google Scholar

Sarma, A.V.N., ((1974)). Holocene paleoecology of south coastal Ecuador. Proceedings American Philosophical Society 118 93–134.Google Scholar

Sarnthein, M., Walger, E., ((1974)). Der äolische Sandstrom aus W-Sahara zur Atlantikküste. Geologische Rundschau 63 1065–1087.CrossRefGoogle Scholar

Schlanger, S.O., ((1963)). Subsurface Geology of Eniwetok Atoll 991–1066U.S. Geological Survey Professional Paper 260-BB.Google Scholar

Schneider, S.H., Mass, C., ((1975)). Volcanic dust, sunspots and temperature trends. Science 190 741–746.CrossRefGoogle Scholar

Schofield, J.C., ((1960)). Sea-level fluctuations during the last 4,000 years as recorded by chenier plain, Firth of Thames, New Zealand. New Zealand Journal of Geology and Geophysics 3 465–485.Google Scholar

Schofield, J.C., ((1973)). Post-glacial sea levels of Northland and Auckland. New Zealand Journal of Geology and Geophysics 16 359–366.CrossRefGoogle Scholar

Schove, D.J., ((1964)). Solar cycles and equatorial climates. Geologische Rundschau 54 448–477.CrossRefGoogle Scholar

Servant, M., Servant, S., Delibrias, G., ((1969)). Chronologie du Quaternaire recent des basses regions du Tchad. Comptes Rendus Academie Sciences, Paris 269 1603–1606.Google Scholar

Shepard, F.P., ((1963)). Thirty-five thousand years of sea level. Clemmens, T., Essays in Marine Geology in Honor of K. O. Emery University of Southern California Press Los Angeles 1–10.Google Scholar

Sherbrooke, W.C., Paylore, P., ((1973)). World Desertification: Cause and Effect. A Literature Review and Annotated Bibliography. University of Arizona, Arid Lands Resource Information Tuscon, ArizPaper 3.Google Scholar

Singh, G., Joshi, R.D., Singh, A.B., ((1972)). Stratigraphic and radiocarbon evidence for the age and development of three salt lake deposits in Rajasthan, India. Quaternary Research 2 496–505.CrossRefGoogle Scholar

Smith, H.T.U., ((1965)). Dune morphology and chronology in central and western Nebraska. Journal of Geology 73 557–578.CrossRefGoogle Scholar

Street, F.A., Grove, A.T., ((1976)). Environmental and climatic implications of late Quaternary lake-level fluctuations in Africa. Nature (London) 261 385–390.CrossRefGoogle Scholar

Suess, H.E., ((1970)). The Three causes of the secular 14C fluctuations, their amplitudes and time constants. Olsson, I., Radiocarbon Variations and Absolute Dating Wiley New York 595–604.Google Scholar

Temple, P.H., ((1967)). Causes of intermittent decline of the level of Lake Victoria during the late Pleistocene and Holocene. Liverpool Essays in Geography Longmans London 43–63.Google Scholar

Ten Brink, N.W., Weidick, A., ((1974)). Greenland ice-sheet history since the last glaciation. Quaternary Research 4 429–440.CrossRefGoogle Scholar

Ters, M., ((1973)). Les variations du niveau marin depuis 10,000 ans, le long du littoral Atlantique Francais. Bulletin Association Francaise du Quaternaire 36 114–135(INQUA Suppl.).Google Scholar

Thompson, L.G., Hamilton, W.L., Bull, C., ((1975)). Climatological implications of microparticle concentrations in the ice core from “Byrd” station, western Antarctica. Journal of Glaciology 14 433–444.CrossRefGoogle Scholar

Tooley, M.J., ((1974)). Sea-level changes during the last 9,000 years in northwest England. Geographical Journal 140 18–42.CrossRefGoogle Scholar

Tracey, J.I. Jr., Ladd, H.S., ((1974)). Quaternary history of Eniwetok and Bikini Atolls, Marshall Islands. Proceedings 2nd International Coral Reef Symposium Vol. 2 Great Barrier Reef Committee Brisbane 537–550.Google Scholar

Van der Hammen, T., ((1974)). The Pleistocene changes of vegetation and climate in tropical South America. Journal of Biogeography 1 3–26.CrossRefGoogle Scholar

Van Zinderen Bakker, E.M., Coetzee, J.A., ((1972)). A reappraisal of late Quaternary climate evidence from tropical Africa. Palaeoecology of Africa Vol. 7 Balkema Cape Town.Google Scholar

Van Zuidam, R.A., ((1975)). Geomorphology and archaeology: Evidences of interrelation and historical sites in the Zaragoza region, Spain. Zeitschrift für Geomorphologie 19 319–328.CrossRefGoogle Scholar

Vita-Finzi, C., 1969a. The Mediterranean Valleys. Cambridge University Press CambridgeCambridge.Google Scholar

Vita-Finzi, C., 1969b. Late Quaternary alluvial chronology in Iran. Geologische Rundschau 58 951–973.CrossRefGoogle Scholar

Vita-Finzi, C., ((1972)). Supply of fluvial sediment to the Mediterranean during the last 20,000 years. Stanley, D.J., The Mediterranean Dowden, Hutchinson and Ross Stroudsburg, Pa.Google Scholar

Ward, W.T., ((1971)). Postglacial changes in level of land and sea. Geologie en Mijnbouw 50 703–718.Google Scholar

Williams, G., ((1970)). Piedmont sedimentation and late Quaternary chronology in the Biskra region of the northern Sahara. Zeitschrift für Geomorphologie, Supplement 10 40–63.Google Scholar

Williams, M.A.J., Adamson, D.A., ((1974)). Late Pleistocene desiccation along the White Nile. Nature (London) 248 584–586.CrossRefGoogle Scholar

Woldstedt, P., 1958–1965. Das Eiszeitalter. F. Enke Verlag Stuttgart.Google Scholar

Zeuner, F.E., ((1953)). Das Problem der Pluvialzeiten. Geologische Rundschan 41 242–253.CrossRefGoogle Scholar