Markevich V. S., Bugdaeva E. V., Bolotsky Yu. L.
В журнале Russian Journal of Pacific Geology
Год: 2010 Том: 4 Номер: 6 Страницы: 502–509
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.
