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Diatom Microflora of Ouled Djilali Section (Messinian Diatomites from Lower Chelif Basin, North-Western Algeria)

Advances in Science, Technology and Innovation, ISSN: 2522-8722, Issue: 978-3-030-72546-4, Page: 239-242
2022
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Book Chapter Description

Quantitative and qualitative analyses of diatom assemblages of the Ouled Djilali section (lower Chelif basin, Northern Algeria) were produced for the first time. A total of 77 diatom and silicoflagelates species were determined: 43 centrics, 27 pennates, and 7 silicoflagelates. The majority of the analyzed samples essentially consists of planktic diatoms, except for a few levels where benthic pennate diatoms dominate. The diatom assemblages characterize a marine opened environment subject to oceanic waters influence. The predominance of the species Thalassionema nitzschioides and/or Thalassiothrix longissima indicates periods of strong productivity that can be associated to an upwelling system.

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