Abstract
Liquid separation procedures can generally be assigned to one of two groups. (i) Gravity separation techniques: use a gravity difference between particles within a residue. The procedure’s success is considerably improved by using a liquid with a specific gravity (S.G.) value between the two main mineralogical components to be separated. These techniques are most successful with sand grade or fine sand grade material. (ii) Centrifuge liquid separation techniques: undertaken with the aid of a rotary machine creating a centrifugal force to separate particles. Centrifugation can be further enhanced by using density liquids. The technique is suitable for material <50µm in diameter (coarse silt to clay grade material), and is detailed in section 17 CENTRIFUGE TECHNIQUES USED IN MICROPALAEONTOLOGY.
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References
ALLMAN, M and LAWRENCE, D. F. 1972. Geological Laboratory Techniques. Blandford, ( London ). 1–335 p.
ANONYMOUS. 1935. Recovery of foraminifera by means of flotation, Laboratory of N. V. Bataafsche Petroleum Maatschappij. Journal of Paleontology. 9, (8), 745–746.
BE, A. W. H. 1959. A method for rapid sorting of foraminifera from marine plankton samples. Journal of Paleontology. 33, (5), 846–848.
BELKA, Z, SKOMPSKI, S and WAKSMUNDZKI, B. 1989. A new interfacial method for conodont separation. Journal of Paleontology. 63, (2), 253–255.
BENJAMIN, R. E. K. 1971. Recovery of heavy liquids from dilute solutions. American Mineralogist. 56, (3/4), 613–619.
BOLTOVSKOY, E. 1966. Methods for sorting of foraminifers from plankton samples. Journal of Paleontology. 40, (5), 1244–1246.
BRASIER, M. D. 1980. Microfossils. Allen and Unwin (London). xii + 193p.
BROOKS, H. K. 1954. A method for removing platy fragments of fossils and minerals from microfossil concentrates. Micropaleontologist. 8, (4), 39–40.
BUZAS, M. A. 1965. Foraminifera from late Pleistocene clay near Waterville, Maine. Smithsonian Miscellaneous Collection. 145, (8), 1–30.
CALLAHAN, J. 1987. A nontoxic heavy liquid and inexpensive filters for separation of mineral grains. Journal of Sedimentology. 57, (4), 765–766.
CARSON, C. M. 1933. A method of concentrating foraminifera. Journal of Paleontology. 7, (4), 439.
CARSON, C. M. 1953. Heavy liquid concentration of foraminifera. Journal of Paleontology. 27, (6), 880–881.
CHARLTON, D. S. 1969. An improved technique for heavy liquid separation of conodonts. Journal of Paleontology. 43, (2), 590–592.
COHEE, G. V. 1937. Inexpensive equipment for reclaiming heavy liquids. Journal of Sedimentary Petrology. 7, (1), 34–35.
COLLINSON, C. 1963. Collecting and preparation of conodonts through mass production techniques. Illinois State Geological Survey. Circular 343, 1–16.
DAVIS, L and WEBSTER, G. D. 1985. A modified funnel for heavy mineral separations. Journal of Paleontology. 59, (6), 1505–1506.
FREEMAN, E. F. 1982. Fossil bone recovery from sediment residues by the “interfacial method”. Palaeontology. 25, (3), 471–484.
FREY, D. G. 1955. A differential flotation technique for recovering microfossils from inorganic sediments. New Phytologist. 54, (2), 257–258.
GIBSON, T. G and WALKER, W. M. 1967. Flotation methods for obtaining foraminifera from sediment samples. Journal of Paleontology. 41, (5), 1294–1297.
HAUFF, P. L and AIREY, J. 1980. The handling, hazards and maintenance of heavy liquids in the geologic laboratory. U. S. Geological Survey Circular. 827, 24 p.
HIGGINS, A. C and SPINNER, E. G. 1969. Techniques for the extraction of selected microfossils. Geology–Journal of the Association of Teachers in Geology. 1, 12–28.
HODSON, F and HODSON, H. 1926. Shortcuts in picking out and sorting foraminifera. Bulletin of the American Association of Petroleum Geologists. 10, (11), 1173–1174.
HOWE, H. V. 1941. Use of soap in the preparation of samples for micropalaeontological study. Journal of Paleontology. 15, (6), 690.
KNOX, A. S. 1942. The use of bromoform in the separation of noncalcareous microfossils. Science. 95, 307–308.
KORNICKER, L. S. 1957. Concentration of ostracodes by alcohol flotation. Journal of Paleontology. 31, (5), 1030.
KRUKOWSKI, S. T. 1988. Sodium metatungstate: a new heavy mineral separation medium for the extraction of conodonts from insoluble residues. Journal of Paleontology. 62, (2), 314–316.
LEHMANN, G and RÖTTGER, R. 1997. Techniques for the concentration of foraminifera from coastal salt meadow sediments. Journal of Micropalaeontology. 16, (1), 144.
LUTZE, G. F. 1968. Jahresgang der foraminiferen-fauna in der Bottsand-Lagune (westliche Ostsee). Meyniana. 18, 13–30.
MERRILL, G. K. 1985. Interfacial alternatives to the use of dangerous heavy liquids in micropalaeontology. Journal of Paleontology. 59, (2), 479–481.
MERRILL, G. K. 1987. Improvements in interfacial methods for conodont separation, pp55–63: In; R. L. Austin (ed), Conodonts: Investigative Techniques and Applications. Ellis Horwood Ltd, ( Chichester ). 1–422.
MILESON, P and JEPPSSON, L. 1983. Heavy liquid and solvent recovery, an economical method. Journal of Sedimentar Petrology. 53, (2), 673–674.
MURRY, P. A and LEZAK, J. 1977. Recovery of vertebrate microfossils with tetrabromoethane. Curator. 20, (1), 15–22.
MURRAY, J. W. 1979. British nearshore foraminiferids. The Linnean Society (London) and Estuarine and Brackish-Water Sciences Association, Synopses of the British Fauna_(New Series), D. M. Kermack and R. S. K. Barnes (eds). No. 16. v + 68p.
SACHS, Jr., K. N, CIFELLI, R and BOWEN, V. T. 1964. Ignition to concentrate shelled organisms in plankton samples. Deep-Sea Research. 11, 621–622.
SAVAGE, N. M. 1988. The use of polytungstate for conodont separations. Journal of Micropalaeontology. 7, (1), 39–40.
SMITH, R. K. 1967. Ignition and filter methods of concentrating shelled organisms. Journal of Paleontology. 41, (5), 1288–1291.
TRAVERSE, A. 1988. Paleopalynology. Unwin Hyman (London). xxiii + 600p.
TUCKER, M. E. 1990. Techniques in Sedimentology. Blackwell (Oxford). ix + 394p.
TURNER, W. M. 1966. An improved method for recovery of bromoform used in mineral separation. U. S. Geological Survey Professional Paper. 550-C, 224–227.
VON BITTER, P. H and MILLAR-CAMPBELL, C. 1984. The use of “spikes” in monitoring the effectiveness of phosphatic microfossil recovery. Journal of Paleontology. 58, (5), 1193–1195.
VON HOFE GRADY, F. 1979. Some new approaches to microvertebrate collecting and processing. Newsletter of the Geological Curators Group. 2, (7), 439–442.
WRIGHT, R. C and HAY, W. W. 1971. The abundance and distribution of foraminifers in a back-reef environment, Molasses Reef, Florida. Miami Geological Society. Memoir 1, 121–174.
YAKOVLEY, N. V and SHTERENBERG, L. YE. 1967. Use of detachable centrifuge test tube for conodont separation. Paleontological Journal. 1, (3), 93–94.
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Green, O.R. (2001). Flotation and Liquid Separation Techniques. In: A Manual of Practical Laboratory and Field Techniques in Palaeobiology. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0581-3_19
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DOI: https://doi.org/10.1007/978-94-017-0581-3_19
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