Sedimentation of organic particles by Alfred Traverse

By Alfred Traverse

This e-book offers learn paintings at the sedimentation of parts of palynofacies and information their value for series stratigraphy and the translation of historic biologic and geologic environments. After a complete creation, later chapters examine palynosedimentation in glossy environments, the reconstruction of terrestrial crops, the appliance of the knowledge to series stratigraphy and several other chapters care for a number of quantitative tools and their particular purposes within the topic.

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1974). Corresponding patterns of pollen and vegetation in Lower Michigan: a comparison of quantitative data. Ecology, 55, 17-28. Winkelmolen, A. M. (1982). Critical remarks on grain parameters, with special emphasis on shape. Sedimentology, 29, 255-65. 3 Transport and deposition of pollen in an estuary: signature of the landscape GRACE S. BRUSH and LUCIEN M. BRUSH Introduction Pollen preserved in lake and peat sediments has been used to reconstruct changes in vegetation induced by climatic events (Davis, Spear, & Shane, 1980; Webb, Cushing, & Wright, 1983; Davis & Jacobson, 1985) and by anthropogenic alterations to the landscape (Brugam, 1978; Burden et al, 1986).

Scanning electron micrographs of pollen grains used in laboratory experiments. (A) Quercus alba (white oak); (B) Ambrosia trifida (giant ragweed); (C) Carya tomentosa (mockernut hickory); (D) Salix nigra (black willow). assumed that the smaller of the two visible axes approximates the intermediate diameter of the grain, and is considered a close approximation to the nominal diameter of the particle (Cui & Komar, 1984). The third axis aligned parallel to the viewer's eye, is the smallest dimension due to the orientation of the grain on the slide.

The error bars give the 95% confidence limits for each data point; lines are fitted by eye. of deposition can be seen to decrease with flow velocity once a critical point is reached. Experiments could not be run at higher velocities, because of the limitations of the equipment used. I suggest, however, that once the threshold for grain movement is reached, the inverse rate of deposition of the sporomorphs will begin to rise as sporomorphs are resuspended. At flow velocities of up to 15 cm/sec, sporomorphs are deposited at a rate similar to that calculated from experiments where no bed was used.

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