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Biogenic fossils

Biogenic fossils Can some of the structures seen in meteorites, especially ALH84001, be attributed to astrobiology on other planets and what is the size of a cell ... [Pg.190]

The preservation of biogenic isotopic signals ( C, N) in fossil bones and teeth is critical in order to interpret paleodiets. Some patterns of variation of these biogenic isotopic signals are characteristic of modern mammals, and their recognition in fossil samples provides a clue for the preservation of biogenic paleodietaiy signals. [Pg.65]

BIOGENIC ISOTOPIC SIGNALS USED TO ASSESS THE PRESERVATION OF ISOTOPIC SIGNALS IN FOSSIL SAMPLES FROM C3 PLANT FOOD WEBS... [Pg.67]

Sillen, A. 1986 Biogenic and diagenetic Sr/Ca in Plio-Pleistocene fossils of the Omo Shungura formation. PaZeohioZogv 12 311-323. [Pg.114]

Biogenic structures Structures in fossils or rock formations that may have been formed by biological activity. [Pg.308]

Comparing rural with "typical" urban samples (2nd entry, Table 5), we find that fossil carbon predominates in the urban particulate matter, and the converse. A significant amount of biogenic carbon is found in the urban samples (even in the absence of wood burning), however and this may be related to vegetative emissions. For example, besides fossil fuel indicators such as... [Pg.176]

Parallel (multidimensional) measurements of size- or chemically selected particles permit the simultaneous resolution of biogenic material from fossil sources (14C), discrimination between certain fossil sources and between marine and terrestrial vegetation (13C), and partial separation of agricultural burning sources (K/Fe). The term iMu represents the fraction of modern C based on standard Slk 813C represents the deviation (per mil) of the 13C/12C ratio from standard Sls (2). [Pg.181]

Gas chromatography has been used to distinguish between fossil fuels added to sediments through oil pollution and those hydrocarbons present in low concentrations as natural biogenic products (Blumer and Sass [11], Farrington and Quinn [12]). [Pg.120]

Kolodny Y, Luz B, Navon O (1983) Oxygen isotope variations in phosphate of biogenic apatites, 1, Eish bone apatite - rechecking the rules of the game. Earth Planet Sci Lett 64 393 04 Kolodny Y, Luz B, Sander M, Clemens WA (1996) Dinosaur bones fossils or pseudomorphs The pitfalls of physiology reconstruction from apatitic fossils, Palaeogeogr PalaeocUmatol Palaeoecol 126 161-171... [Pg.254]

Laulainen, N., and E. Trexler, Assessing the Relative Contribution of Biogenic and Fossil Processes to Visibility-Scattering Aerosols Found in Remote Areas Near-Term Organic Research Program, J. Air Waste Manage. Assoc., 47, 212-215 (1997). [Pg.428]

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See also in sourсe #XX -- [ Pg.190 ]



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Biogenics

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