Abstract
Reconstructing the origin of bentonitic clays is often a challenging and rather complicated undertaking, but the analysis of certain predictor clay minerals is proving to be an excellent method to simplify this process. The goal of the present investigation was to use abundance changes of five X-ray diffraction (XRD) predictor minerals to determine the relative contributions of weathering and parent-rock changes to the origin of clay minerals in Egyptian bentonitic clays as the test case. The XRD predictor minerals, selected in an earlier discriminant function analysis of quantitative abundances of 14 minerals, provided a simpler approach to the interpretation of clay-mineral origins because they are the minerals that were most responsible for statistically significant differences among the samples. Changes in mineral composition were basically a function of parent-rock lithology, drainage, and climate interactions. A Paleo-Climate Index (CI; the ratio of coarsely crystalline kaolinite to Fe-rich smectite), and a Parent-Rock Index (PI; the ratio of the illitic phases and quartz abundances to pure smectite) were established to track the paleo-climate and parent-rock changes, respectively. Low CI values indicated that a long, seasonally dry climate prevailed during the Middle Eocene, uppermost Eocene, Lower Miocene, and Upper Pliocene bentonitic clay deposition. Lowermost Upper Eocene and the Middle Miocene bentonitic clays were produced when a wet climate prevailed throughout the year. Moderate to high PI values suggested derivation of the clays from the acidic basement crystalline rocks at Uweinat-Bir Safsaf uplift and Lower Paleogene shales during the Middle Eocene and lowermost Upper Eocene. The youngest Upper Eocene and Lower Miocene materials contained abundant Fe-smectite and low PIs indicating derivation from tholeiitic basalts. Diagenetic and sedimentary segregation modifications were not apparent. Direct evidence for in situ derivation from volcanic precursor materials was lacking in general, but volcanic eruptions were common in the region. The minerals in the Egyptian bentonitic clays formed as weathering products on land and have been transported by north-flowing streams and rivers to the sites of accumulation.
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References
Abayazeed, S.D. (2012) The geochemistry of some Egyptian smectitic clays. Australian Journal of Basic and Applied Sciences, 6(3), 589–599.
Abdel Fattah, Z.A., Gingras, M.K., Caldwell, M.W., and Pemberton, S.G. (2010) Sedimentary environments and depositional characteristics of the Middle to Upper Eocene whale-bearing succession in the Fayum depression, Egypt. Sedimentology, 57, 446–476.
Abdou, M.I. (1983) Geological studies of some volcanic rocks in northern Egypt. M.Sc. thesis, Cairo University.
Abu El Ezz, A.R., Kholeif, M.M., and Abdo, A.A. (1993) Contribution to mineralogy and geochemistry of some bentonite deposits in Egypt. El-Minia Science Bulletin, 6, 79–88.
Agha, M.A., Ferrell, R.E., and Hart, G.F. (2012) Mineralogy of Egyptian bentonitic clays I: Discriminant function analysis. Clays and Clay Minerals, 60, 387–404.
Al Alfi, E.M. (1946) The mineral resources of Egypt. Mining and Petroleum Association of Egypt, 1, 3–47.
Arslan, M., Abdioglu, E., and Kadir, S. (2010) Mineralogy, geochemistry, and origin of bentonite in Upper Cretaceous pyroclastic units of the Tirebolu Area, Giresun, Northeast Turkey. Clays and Clay Minerals, 58, 120–141.
Attia, A.K., Murray, H.H., Azim, A.A., and Boulis, S.N. (1985) Chapter 10. Mineralogy of some Egyptian bentonitic-clay deposits. Pp. 157–184 in: Mineralogy - Applications to the Minerals Industry, Paul F. Kerr Symposium (O. Kopp, editor). Society of Mining Engineers, New York.
Avni, Y., Segevl, A., and Ginat H. (2012) Oligocene regional denudation of the northern Afar dome: Pre- and synbreakup stages of the Afro-Arabian plate. Geological Society of America Bulletin, 124, 1871–1897.
Basta, E.Z., El-Kadi, M.B., and Abdel Maksoud, M. (1970) Mineralogy of some bentonitic clays from Fayoum, U.A.R. and Aldress, Shropshire, England. Bulletin of the Faculty of Science, Cairo University, 43, 271–284.
Bican-Brişan, N. and Hosu, A. (2006) Clay mineral association in the salt formation of the Transylvanian basin and its paleoenvironmental significance. Studia Universitatis Babeş-Bolyai, Geologia, 51, 35–41.
Bohannon, R.G., Naeser, C.W., Schmidt, D.L., and Zimmermann, R.A. (1989) The timing of uplift, volcanism, and rifting peripheral to the Red Sea: a case for passive rifting? Journal of Geophysical Research, 94(B4), 1683–1701.
Boulet, R., Lucas, Y., Fritsch, E., and Paquet, H. (1997) Geochemical processes in tropical landscapes: role of the soil covers. Pp. 67–96 in: Soils and Sediments: Mineralogy and Geochemistry (H. Paquet and N. Clauer, editors). Springer, Berlin.
Cachel, S. (1979) A paleoecological model for the origin of higher primates. Journal of Human Evolution, 8, 351–359.
Chamley, H. (1989) Clay Sedimentology. Springer-Verlag, Berlin, Heidelberg, 623 pp.
Chapman, R.W. (1971) Climatic changes and the evolution of landforms in the Eastern Province of Saudi Arabia. Geological Society of America Bulletin, 82, 2713–2728.
Christidis, G.E. (1995) Mechanism of illitization of bentonites in the geothermal field of Milos Island, Greece. Evidence based on mineralogy, chemistry, particle thickness and morphology. Clays and Clay Minerals, 43, 569–585.
Christidis, G.E. (2001) Geochemical correlation of bentonites from Milos Island, Aegean, Greece. Clay Minerals, 36, 295–306.
Christidis, G.E. and Huff, W.D. (2009) Geological aspects and genesis of bentonite. Elements, 5, 93–98.
Conway, D. (2000) The climate and hydrology of the Upper Blue Nile River. The Geographical Journal, 166(1), 49–62.
Cravero, F., Marfil, S.A., and Maiza, P.J. (2010) Statistical analysis of geochemical data: a tool for discriminating between kaolin deposits of hypogene and supergene origin, Patagonia, Argentina. Clay Minerals, 45, 183–196.
Cuadros, J., Dekov, V.M., Arroya, X., and Nieto, F. (2011) Smectite formation in submarine hydrothermal sediments: Samples from the HMS Challenger Expedition (1872-1876). Clays and Clay Minerals, 59, 147–167.
Diester-Haass, L., Robert, C., and Chamley, H. (1998) Paleoproductivity and climate variations during Sapropel deposition in the Eastern Mediterranean Sea. Pp. 227–248 in: Proceedings of the Ocean Drilling Program, Scientific Results, 160 (A.H.F. Robertson, K.C. Emeis, C. Richter, and A. Camerlenghi, editors). College Station, Texas, USA.
Ebinger, C.J., and Sleep, N.H. (1998) Cenozoic magmatism throughout east Africa resulting from impact of a single plume. Nature, 395, 788–791.
Eden, D.N., Palmer, A.S., and Cronin, S.J. (2001) Dating the culmination of river aggradation at the end of the last glaciation using distal tephra compositions, eastern North Island, New Zealand. Geomorphology, 38, 133–151.
EGSMA (1992) Report on the Egyptian bentonite deposits. Egyptian Geological Survey and Mining Authority (internal report, in Arabic), 36 pp.
Egyptian National Commission for UNESCO (2004) Nomination File for the Inscription of Wadi Al-Hitan (Whale Valley), the Western Desert of Egypt. The World Heritage List, 1186. [Contains a bibliography of 30 references].
Ekosse, G-I.E., and Mwitondi, K.S. (2009) Multiple data clustering algorithms applied in search of patterns of clay minerals in soils close to an abandoned manganese oxide mine. Applied Clay Science, 46, 1–6.
El Anbaawy, M.I.H., Dardir, A.A., and Meabed, E.E. (1990) Liability of bentonitic clays from eastern part of El-Fayoum Governorate in Foundry sands. Annals of the Geological Survey of Egypt, XVI, 45–49.
El Gaby, S., List, F.K., and Tehrani, R. (1990) The basement complex of the Eastern Desert and Sinai. Pp. 175–184 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam.
El Hedeny, M. (2007) Encrustation and bioerosion on Middle Miocene bivalve shells and echinoid skeletons: paleoenvir-onmental implications. Revue de Paléobiologie, Genève, 26, 381–389.
El Hefnawi, M.A., Loukina, S.M., and Abayzeed, S.D. (1994) Mineralogy and geochemistry of smectitic clays from Fayoum region, Egypt. The Mineralogical Society of Egypt, Proceedings of the 1st International Symposium on Industrial Applications of Clays, Cairo, pp. 128–150.
El Khoriby, E.M. (2005) Origin of the gypsum-rich silica nodules, Moghra Formation, Northwest Qattara depression, Western Desert, Egypt. Sedimentary Geology, 177, 41–55.
El Shabiny, A.M., Hammad, S.M., Ibrahim, I.A., and Ismail, A.k. (1996) Combined thermal and structural study of some Egyptian bentonitic clays. Journal of Thermal Analysis, 46, 1421–1435.
El Shahat, A., Ayyad, S.N., and Abdalla, M.A. (1997) Pliocene facies and fossil contents of Qaret El-Muluk Formation at Wadi El Natrun Depression, Western Desert, Egypt. Facies, 37, 211–224.
Ernst, S.R., Guasti, E., Dupuis, C, and Speijer, R.P. (2006) Environmental perturbation in the southern Tethys across the Paleocene/Eocene boundary (Dababiya, Egypt): Foraminiferal and clay mineral records. Marine Micropaleontology, 60, 89 - 111.
Ferrell, R.E. (2006) Clay Mineralogy - An Introductory Course, CD Series 1. The Clay Minerals Society, Chantilly, Virginia, USA.
Ferrell, R.E. and Dypvik, H. (2009) The mineralogy of the Exmore beds - Chickahominy Formation boundary section of the Chesapeake Bay impact structure revealed in the Eyreville core. Geological Society of America Special Paper 458, 723–746.
Ferrell, R.E., Hart, G.F., Swamy, S., and Murthy, B. (1998) X-ray mineralogy discrimination of depositional environments of the Krishna Delta, Peninsular India. Journal of Sedimentary Research, 68, 148–154.
Galân, E. (2006) Genesis of clay minerals. Pp. 1129–1162 in: Handbook of Clay Science (F. Bergaya, B.K.G. Theng, and G. Lagaly, editors). Elsevier, Oxford, UK.
Galân, E. and Ferrell, R.E. (2013) Genesis of clay minerals. Pp. 83–126 in: Handbook of Clay Science, 2nd edition, Part A (F. Bergaya and G. Lagaly, editors). Elsevier, Oxford, UK.
Garfunkel, Z. (1988) Relation between continental rifting and uplifting: evidence from the Suez Rift and northern Red Sea. Tectonophysics, 150, 33–49.
Gass, I.G. (1977) The evolution of the Pan-African crystalline basement in NE Africa and south Arabia. Journal of Geological Society of London, 134, 129–138.
Ghandour, I.M., Abd El-Hameed, A.T., Faris, M., Marzouk, A., and Maejima, W. (2004) Textural, mineralogical and microfacies characteristics of the Lower Paleogene succession at the Nile Valley and Kharga Oasis regions, Central Egypt. Journal of Geosciences, Osaka City University, 47, 39–53.
Gibson, T.G., Bybell, L.M., and Mason, D.B. (2000) Stratigraphic and climatic implications of clay mineral changes around the Paleocene/Eocene boundary of the northeastern US margin. Sedimentary Geology, 134, 65–92.
Goudie, A.S. (2005) The drainage of Africa since the Cretaceous. Geomorphology, 67, 437–456.
Griffin, D.L. (2002) Aridity and humidity: two aspects of the late Miocene climate of North Africa and the Mediterranean. Palaeogeography, Palaeoclimatology, Palaeoecology, 182, 65–91.
Grim, R.E., and Güven, N. (1978) Bentonites: Geology, Mineralogy, Properties and Uses. Developments in Sedimentology, 24, Elsevier North-Holland, Amsterdam, 256 pp.
Güven, N. (2009) Bentonites - Clays for molecular engineering. Elements, 5, 89–92.
Hamblin, R.D. (1987) Stratigraphy and Depositional Environments of the Gebel-Rus Area, Eastern Faiyum, Egypt. Brigham Young University, Geology studies, 34, 61–84.
Harms, J.C. nd Wray, J.L. (1990) Nile Delta. Pp. 329–344 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam.
Hart, G.F. (1994) Maceral palynofacies of the Louisiana deltaic plain in terms of organic constituents and hydrocarbon potential. Pp. 141–176 in: Sedimentation of Organic Particles (A. Traverse, editor). Cambridge University Press, UK.
Hart, G.F., Ferrell, R.E., Lowe, D.R., and Lenoir, A.E. (1989) Shelf sandstones of the Robulus L zone, offshore Louisiana. Pp. 117–141 in: Shelf Sedimentation, Shelf Sequences and Related Hydrocarbon Accumulation (R.A. Morton and D. Nummedal, editors). Proceedings of the Seventh Annual Gulf Coast Section SEPM Research Conference.
Hayden, C.C. (1988) Clay mineral origin and alteration in fluvial facies of the Lebo Member, Fort Union Formation (Paleocene), Custer County, Southeastern Montana. Keck Geology Consortium, 1, 57–60.
Herendeen, P.S. and Jacobs, B.F. (2000) Fossil Legumes from the Middle Eocene (46.0 MA) Mahenge Flora of Singida, Tanzania. American Journal of Botany, 87(9), 1358–1366.
Hower, Z., Eslinger, E.V., Hower, M.E., and Perry, E.A. (1976) Mechanism of burial metamorphism of argillaceous sediment - Mineralogical and chemical evidence. Bulletin of Geological Society of America, 87, 725–737.
Huff, W.D. and Kolata, D.R., (1990) Correlation of K-bentonite beds by chemical fingerprinting using multivariate statistics. Pp. 567–577 in: Quantitative Dynamic Stratigraphy (T.A. Cross, editor). Prentice Hall, New Jersey, USA.
Huggett, J.M., Gale, A.S., and McCarty, D. (2010) Petrology and palaeoenvironmental significance of authigenic iron-rich clays, carbonates and apatite in the Claiborne Group, Middle Eocene, NE Texas. Sedimentary Geology, 228, 119–139.
Ibrahim, I.A., Felix, N.S., Ismail, A.K., and Abdul Azim, F. (1994) Improvement of the rheological properties of Egyptian bentonitic clay through alkali activation. The Mineralogical Society of Egypt, Proceedings of the 1st International Symposium on industrial applications of clays, Cairo, pp. 174–180.
Issar, A. (2003) Climate Changes during the Holocene and their Impact on Hydrological Systems. The Press Syndicate of the University of Cambridge, Cambridge, UK, 129 pp.
Issawi, B. (1983) Ancient Rivers of the Eastern Egyptian Desert. Episodes, 2, 3–6.
Issawi, B. and McCauley, J.F. (1993) The Cenozoic landscape of Egypt and its river system. Annals of the Geological Survey of Egypt, XIX, 357–384.
Jacobs, B.F. (2004) Palaeobotanical studies from tropical Africa — relevance to the evolution of forest, woodland and savannah biomes. Philosophical Transactions of Royal Society, London, 359, 1573–1583.
Jacobs, B.F. and Herendeen, P.S. (2004) Eocene dry climate and woodland vegetation in tropical Africa reconstructed from fossil leaves from northern Tanzania. Palaeogeography, Palaeoclimatology, Palaeoecology, 213, 115–123.
Jacobs, B.F., Kingston, J.D., and Jacobs, L.L. (1999) The origin of grass-dominated ecosystems. Annals of the Missouri Botanical Garden, 86(2), 590–643.
Kadir, S., Erman, H., and Erkoyun, H. (2011) Characteristics and genesis of hydrothermal kaolinite deposits within Neogene volcanites, Kutahya (Western Anatolia), Turkey. Clays and Clay Minerals, 59, 250–276.
Karakaya, M.C., Karakaya, N., and Kupeli, S. (2011) Mineralogical and geochemical properties of the Na- and Ca-bentonites of Ordu (NE Turkey). Clays and Clay Minerals, 59, 75–94.
Kohn, B.P. and Eyal, M. (1981) History of uplift of the crystalline basement and its relation to opening of the Red Sea as revealed by fission track dating of apatites. Earth and Planetary Science Letters, 52, 129–141.
Kolata, D.R., Huff, W.D., and Bergstrom, S.M. (1996) Ordovician K-bentonites of Eastern North America. Geological Society of America Special Paper, 313, 84 pp.
Kusky, T. and El Baz, F. (2000) Neotectonics and fluvial geomorphology of the northern Sinai Peninsula. Journal of African Earth Sciences, 31, 213–235.
Lahr, M.M. (2010) Saharan corridors and their role in the evolutionary geography of “Out of Africa I”. Pp. 27–46 in: Out of Africa I: The First Hominin Colonization of Eurasia (J.G. Fleagle, J.J. Shea, F.E. Grine, A.L. Baden, and R.E. Leakey, editors). Springer, Dordrecht, The Netherlands.
Lindgreen, H. and Hansen, P.L. (1991) Ordering of illite/ smectite in Upper Jurassic claystones from the North Sea. Clay Minerals, 26, 105–125.
Madsen, H.B., and Nornberg, P. (1995) Mineralogy of four sandy soils developed under heather, spruce and grass in the same fluvioglacial deposit in Denmark. Geoderma, 64, 233–256.
Maley, J. (1996) The African rain forest — main characteristics of changes in vegetation and climate from the Upper Cretaceous to the Quaternary. Proceedings of the Royal Society of Edinburgh, 104, 31–73.
Mannion, A.M. (2008) The Tertiary-Quaternary environmental history of the Mediterranean Basin — the background to Mediterranean Island environments. Pp. 15–35 in: Mediterranean Island Landscapes: Natural and Cultural Approaches (I.N. Vogiatzakis, G. Pungetti, and A.M. Mannion, editors). Springer, Dordrecht, The Netherlands.
Mansour, S. and Hasebe, N. (2010) Evolution and thermotectonic development of the basement complex, west-central Sinai, Egypt: Constraints from uranium-lead dating and apatite fission track low-temperature thermochronology. Fission-track Newsletter, 23, 8–9.
McCarty, D.K., Sakharov, B.A., and Drits, V.A. (2008) Early clay diagenesis in Gulf Coast sediments: new insights from XRD profile modeling. Clays and Clay Minerals, 56, 359–379.
McGuire, A.V. and Bohannon, R.G. (1989) Timing of mantle upwelling: Evidence for a passive origin for the Red Sea rift. Journal of Geophysical Research, 94, 1677–1682.
Meneisy, M.Y. (1990) Vulcanicity. Pp. 157–174 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam, The Netherlands.
Meshref, W.M. (1990) Tectonic framework. Pp. 113–156 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam, The Netherlands.
Mess, A., Mohr, B., and Martin, T. (2001) Evolutionary transformations of hystricognath Rodentia and the climatic change in the Eocene to Late Oligocene time interval. Mitteilungen aus dem Museum für Naturkunde in Berlin Zoologische Reihe, 77, 193–206.
Meunier, A. (2005) Clays. Springer-Verlag, Berlin, 472 pp.
Millar, I. (1993) Impact of the Eocene on the evolution of Pinusl. Annals of the Missouri Botanical Garden, 80, 471–498.
Millot, G. (1970) Geology of Clays. Springer-Verlag, New York, 429 pp.
Montero-Serrano, J.C., Pararea-Albaladejo, J., Martin-Fernandez, J.A., Martinez-Santana, M., and Gutierrez-Martin, J.V. (2010) Sedimentary chemofacies characterization by means of multivariate analysis. Sedimentary Geology, 228, 218–228.
Morgan, P. (1990) Egypt in the framework of global tectonic. Pp. 91–112 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam, The Netherlands.
Murray, H.H. (2007) Applied Clay Mineralogy: Occurrences, Processing and Applications of Kaolins, Bentonites, Palygorskite-Sepiolite, and Common Clays. Developments in Clay Science, 2, Elsevier, Amsterdam, 188 pp.
Nyblade, A., Park, Y., Rodgers, A., and Al-Amri, A. (2006) Seismic structure of the Arabian Shield lithosphere and Red Sea margin. Margins Newsletter, 17, 13–15.
Omar, G.I., Steckler, M.S., Buck, W.R., and Kohn, B.P. (1989) Fission-track analysis of basement apatites at the western margin of the Gulf of Suez rift, Egypt: evidence for synchroneity of uplift and subsidence. Earth and Planetary Science Letters, 94, 316–328.
Perrin, M., Saleh, A., and Alva-Valdivia, L. (2009) Cenozoic and Mesozoic basalts from Egypt: a preliminary survey with a view to paleointensity. Earth Planets Space, 61, 51–60.
Prudencio, M.I., Sequeira Braga, M.A., Oliviera, F., Dias, M.I., Delgado, M., and Martins, M. (2006) Raw material sources for the Roman Bracarense ceramics (NW Iberian Peninsula). Clays and Clay Minerals, 54, 638–649.
Rashed, M.A. (1991) Engineering-geological properties of Pliocene argillaceous sediments of the Wadi El Natrun area, Egypt. Bulletin of the International Association of Engineering Geology, 44, 69–77.
Richter, A. and Schandelmeier, H. (1990) Precambrian basement inliers of Western Desert: geology, petrology and structural evolution. Pp. 185–200 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam, The Netherlands.
Righi, D. and Meunier, A. (1995) Origin of clays by rock weathering and soil formation. Pp. 43–161 in: Origin and Mineralogy of Clays: Clays and the Environment (B. Velde, editor). Springer-Verlag, Berlin, Heidelberg.
Saad, S.I., Zaghloul, Z.M., and El Beialy, S.Y. (1987) Late Tertiary-Quaternary palynomorphs from the northern coast of the Nile Delta. Neues Jahrbuch für Geologie und Paläontologie Monatshefte, 5, 314–320.
Said, R. (1981) The geological evolution of the River Nile. Spring-Verlag, New York, 151 pp.
Said, R. (1990a) Red Sea coastal plain. Pp. 345–360 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam, The Netherlands.
Said, R. (1990b) Cenozoic. Pp. 451–486 in: The Geology of Egypt (R. Said, editor). A.A. Balkema, Rotterdam, The Netherlands.
Said, R. (1993) The River Nile: Geology, Hydrology and Utilization. Pergamon Press, Oxford, UK, 320 pp.
Said, R., Wendorf, F., and Schild, R. (1975) The geology and prehistory of the Nile Valley in Upper Egypt. Archaeologia Polona, 12, 43–60.
Sanchez, C. and Galán, E. (1995) An approach to the genesis of palygorskite in a Neogene-Quaternary continental basin using principal factor analysis. Clay Minerals, 30, 225–238.
Schulte, P., Sprong, J., Speijer, R.P., Ali, M.Y., and Krumm, S. (2007) Sedimentology and quantitative mineralogy of the Danian-Selandian (D-S) transition on the southern Tethyan margin in Egypt: Implications for sequence stratigraphy and eustatic sea-level changes. Geophysical Research Abstracts, 9, 07338.
Schulte, P., Scheibner, C., and Speijer, R.P. (2011) Fluvial discharge and sea-level changes controlling black shale deposition during the Paleocene-Eocene thermal maximum in the Dababiya Quarry section, Egypt. Chemical Geology, 285, 167–183.
Shane, P.A.R. and Froggatt, P.C. (1994) Discriminant function analysis of glass chemistry of New Zealand and North American tephra deposits. Quaternary Research, 41, 70–81.
Shoval, S. (2004a) Deposition of volcanogenic smectite along the southeastern Neo-Tethys margin during the oceanic convergence stage. Applied Clay Science, 24, 299–311.
Shoval, S. (2004b) Clay sedimentation along the southeastern Neo-Tethys margin during the oceanic convergence stage. Applied Clay Science, 24, 287–298.
Srodon, J., Kotarba, M., Biron, A., Such, P., Clauer, N., and Wojtowicz, A. (2006) Diagenetic history of the Podhale-Orava Basin and the underlying Tatra sedimentary structural units (Western Carpathians): evidence from XRD and K-Ar of illite-smectite. Clay Minerals, 41, 751–774.
Stanley, D.J. and Wingerath, J.G. (1996) Letter Section-Nile sediment dispersal altered by the Aswan High Dam — the kaolinite trace. Marine Geology, 133, 1–9.
Stanley, D.J., Mr, Y., and Galili, E. (1998) Clay mineral distributions to interpret Nile Cell provenance and dispersal: III. Offshore margin between Nile Delta and northern Israel. Journal of Coastal Research, 14, 196–217.
Steckler, M.S. (1985) Uplift and extension at the Gulf of Suez: Indication of induced mantle convection. Nature, 317, 135–139.
Swezey, C.S. (2009) Cenozoic stratigraphy of the Sahara, northern Africa. Journal of African Earth Sciences, 53, 89–121.
Talbot, M.R. and Williams, M.A.J. (2009) Cenozoic evolution of the Nile Basin. Pp. 37–60 in: The Nile: Origin, Environments, Limnology and Human Use (H.J. Dumont, editor). Springer, Berlin.
Tawadros, E. (2001) Geology of Egypt and Libya. A.A. Balkema, Rotterdam, The Netherlands, 468 pp.
Temraz, M.G.M.A. (2005) Mineralogical and geochemical studies of carbonaceous shale deposits from Egypt. PhD thesis, Technischen Universität Berlin, 124 pp.
Thurmond, A.K., Stern, R.J., Abdelsalam, M.G., Nielsen, K.C., Abdeen, M.M., and Hinz, E. (2004) The Nubian Swell. Journal of African Earth Sciences, 39, 401–407.
Van Damme, D. and Van Bocxlaer, B. (2009) Freshwater molluscs of the Nile Basin, past and present. Pp. 585–629 in: The Nile: Origin, Environments, Limnology and Human Use (H.J. Dumont, editor). Springer, Berlin.
Velde, B. (1985) Clay Minerals — A Physico-Chemical Explanation of their Occurrence. Developments in Sedimentology, 40, Elsevier, Amsterdam, 427 pp.
Velde, B. and Barré, B. (2010) Soil, Plants, and Clay Minerals — Mineral and Biologic Interaction. Springer-Verlag, Berlin, Heidelberg, 349 pp.
Velde, B. and Meunier, M. (2008) The Origin of Clay Minerals in Soils and Weathered Rocks. Springer-Verlag, Berlin, Heidelberg, 406 pp.
Velde, B., Goffe, B., and Hoellard, A. (2003) Evolution of clay minerals in a chronosequence of poldered sediments under the influence of natural pasture development. Clays and Clay Minerals, 51, 205–217.
Weaver, C.E. (1989) Clays, Muds and Shales. Developments in Sedimentology, 44, Elsevier, Amsterdam, 819 pp.
Woodward, J.C., Macklin, M.G., Krom, M.D., and Williams, M.A.J. (2007) The Nile — Evolution, Quaternary river environments and material fluxes. Pp. 261–292 in: Large Rivers — Geomorphology and Management (A. Gupta, editor). John Wiley & Sons, Chichester, UK.
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Agha, M.A., Ferrell, R.E., Hart, G.F. et al. Mineralogy of Egyptian Bentonitic Clays II: Geologic Origin. Clays Clay Miner. 61, 551–565 (2013). https://doi.org/10.1346/CCMN.2013.0610608
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DOI: https://doi.org/10.1346/CCMN.2013.0610608