Results 171 to 180 of about 5,075 (214)

The challenge of abundance in palynomorphs

Geoscience and Man, 1975
Abstract An annotated summary is provided of several papers by the author on a new method of data handling that both demands and allows for the much more efficient use of the abundance of palynomorphs in fine stratigraphy. The purpose of assemblage types, biorecords, comparison records, event compilation, bracket correlation, and various nomenclatural ...
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Indicative Value of Non-Pollen Palynomorphs (NPPs) and Palynofacies for Palaeoreconstructions: Holocene Peat, Brazil [PDF]

International Journal of Coal Geology, 2010
The results of the palynological study of the samples from the core, performed in the Aguas Claras peatland, RS, Brazil (50°45′00″W, 30°00′15″S), focus on detailed taxonomic analysis of non-pollen palynomorphs (NPPs) and palynofacies from the Holocene ...
Maristela Bagatin Silva, Svetlana Medeanic, Medeanic, Svetlana, Silva, Maristela Bagatin   +3 more
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Preservation and abundance of palynomorphs in Svalbard

Geological Magazine, 1976
SummaryA summary is given of the preservation and general abundance information on palynomorphs of post-Silurian age in Svalbard. An explanation of the distribution of successful and unsuccessful palynomorph extraction is attempted, with a conclusion that varying burial history under other sediment was the principal controlling factor.
N. F. Hughes, W. B. Harland, D. G. Smith
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Palynomorphs and travel history of vehicles in Nigeria

Aerobiologia, 2019
A reconstruction of the travel histories of vehicles, using palynomorphs (pollen and spores) recovered from dust and soot from their car air filters, in Nigeria was attempted. The vehicles traveled to different localities with distinct vegetation types including rainforest, savanna and montane forest in the country.
Emuobosa Akpo Orijemie, Isaac Israel
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Paleozoic Palynomorphs from Libya

1964
Abstract Marine sediments were deposited in western Libya during most of Paleozoic time. The resulting rock section consists of a thick sequence of detrita rocks, largely dark-gray shales and sandstones, ranging in age from Cambrian to Permian.
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Automatic recognition of complete palynomorphs in digital images

Machine Vision and Applications, 2009
Images of dispersed kerogen preparation are analysed in order to detect palynomorphs of elliptical/spherical shape. This process consists of three automatic stages. Firstly, the background of the image is segmented from the foreground. Secondly the foreground particles are segmented into individual regions. Finally a trained classifier is used to label
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Organic-walled microfossils (palynomorphs)

1996
Abstract This chapter deals with organic-walled microfossils or palynomorphs. These range in size from 5-2000 µ,. Preparation of samples for organic-walled microfossil study generally consists of hydrochloric and fuming nitric acid leaching of calcareous material and hydrofluoric acid leaching of siliceous material followed by sieving ...
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Early Paleozoic Palynomorph Provinces and Paleoclimate

1974
Abstract Lower Paleozoic palynomorphs show large morphologic diversity and are generally extremely abundant in unmetamorphosed marine sediments although the stratigraphic ranges and regional distribution of most taxa are still poorly known. Sufficient data are now becoming available to determine the distribution of palynomorphs in the
Fritz H. Cramer, Maria Del Carmen R. Diez   +1 more
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palynomorph, n.

2023
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The challenge of abundance in palynomorphs: Reply

Geoscience and Man, 1975
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