Palynoflora of the Gil’chin and Dim dinosaur localities (the Zeya-Bureya Basin, Russian Far East)

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• 作者：V. S. Markevich (1)
  E. V. Bugdaeva (1)
  Yu. L. Bolotsky (1)
  
• 关键词：palynology ; stratigraphy ; Late Cretaceous ; Maastrichtian ; dinosaurs ; Zeya ; Bureya Basin
• 刊名：Russian Journal of Pacific Geology
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：4
• 期：6
• 页码：502-509
• 全文大小：219KB
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• 作者单位：V. S. Markevich (1)
  E. V. Bugdaeva (1)
  Yu. L. Bolotsky (1)
  
  1. Institute of Biology and Soil Sciences, Far East Branch, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russia
  
• ISSN：1819-7159

文摘

The analysis of the palynological spectra from the Gil’chin and Dim dinosaur localities of the Zeya-Bureya Basin revealed that the first of them is characterized by the high abundance of Filicales spores accompanied (in descending order) by tricolpate, bisaccate conifer pollen, Ginkgocycadophytus, Taxodiaceae, Cupressaceae, Taxaceae (TCT), Ulmoideipites, and “unica-type pollen. The spectra from the second site are dominated by Filicales spores and (second in significance) pollen of plants characteristic of river valley communities (Platanaceae and Ulmaceae) accompanied by common bisaccate conifer pollen and subordinate TCT and Ginkgocycadophytus pollen. The middle Maastrichtian bone-bearing taphocoenoses of the Gil’chin and Dim localities were formed in spacious swamped river valleys covered by ferns and taxodialeans. The Platanaceae and Ulmaceae pollen implies the development of light forests in river valleys. The Ulmaceae pollen is indicative of highly variable environments in the mid-Maastrichtian, probably, with an intermittent water influx. The low share of bissacate pollen in the palynospectra from these two localities is presumably determined by their remoteness from the slopes of the depression.