scholarly journals Neogene diatom assemblages from lacustrine sediments of Serbia and their distribution in the correlative formations in South-West Bulgaria and Republic of Macedonia

Author(s):  
N. Ognjanova-Rumenova
2003 ◽  
Vol 105 (1) ◽  
pp. 21-24 ◽  
Author(s):  
Sonoko Ishihara ◽  
Megumi Kato ◽  
Yoshihiro Tanimura ◽  
Hitoshi Fukusawa

1989 ◽  
Vol 32 (2) ◽  
pp. 229-243 ◽  
Author(s):  
Françoise Gasse ◽  
Bjørg Stabell ◽  
Elizabeth Fourtanier ◽  
Yolanda van Iperen

AbstractDiatom assemblages from modern West African rivers and from lacustrine sediments subjected to deflation represent the present-day sources of continental diatoms to the sea. Diatom productivity in large rivers is high, especially for the genus Melosira. Windblown diatoms derive mainly from the central and northern Sahara (summer dust plume) where saline chloride-water assemblages are widespread, or from the southern edge of the Sahara (winter dust plume) where Melosira-rich assemblages of dilute water predominate. Freshwater diatom peaks in Atlantic cores may reflect (1) phases of increased river influx, correlated with humid episodes on the continent or (2) phases of enhanced deflation and wind transport during arid episodes (the single hypothesis for fine sediments from mid-ocean sites). Genus Melosira dominates the freshwater assemblages of many modern and fossil marine samples, whatever the transport agent is. Therefore, it is not an accurate paleoclimate indicator by itself, but associated taxa may provide information on the environmental and geographical origin of the displaced diatoms. This tentative approach shows that freshwater diatoms in Atlantic cores may be a good tool for reconstructing paleoclimates and for establishing continent-ocean correlations if species analyses are made and if the continental distribution of the taxa encountered is considered.


2019 ◽  
Vol 25 ◽  
pp. 317
Author(s):  
Ayotunde Ale ◽  
Opeyemi Aloro ◽  
Ayanbola Adepoju
Keyword(s):  

2019 ◽  
Vol 25 ◽  
pp. 121-122
Author(s):  
Olufunmilayo Adeleye ◽  
Ejiofor Ugwu ◽  
Anthonia Ogbera ◽  
Akinola Dada ◽  
Ibrahim Gezawa ◽  
...  

1991 ◽  
Vol 102 (5-6) ◽  
pp. 437-443
Author(s):  
B. M. Sharma
Keyword(s):  

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