Global Geology 2011, 14(3) 144-159 DOI:     ISSN: 1673-9736 CN: 22-1371/P
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Keywords
palynoflore
Cretaceous
Paleogene
boundary
Zeya-Bureya Basin
Authors
Valentina S��Markevich1
Eugenia V��Bugdaeva1
Abdul R��Ashraf2
SUN Ge3
4
PubMed
Article by Valentina S��Markevich1
Article by Eugenia V��Bugdaeva1
Article by Abdul R��Ashraf2
Article by SUN Ge3
Article by 4

Boundary of Cretaceous and Paleogene continental deposits in Zeya-Bureya Basin��Amur ( Heilongjiang) River region

Valentina S��Markevich1, Eugenia V��Bugdaeva1, Abdul R��Ashraf2, SUN Ge3, 4

1�� Institute of Biology and Soil Science��FEB RAS��Vladivostok 690022��Russia; 2�� Institute of Geosciences��University of Tuebingen��Tuebingen 72074��Germany; 3�� Key-Lab for Evolution of Past Life��MOEC��( Jilin University) ��Changchun 130026��China; 4�� College of Paleontology��Shenyang Normal University��Shenyang 110034��China

Abstract��

It was conducted the comparison of palynological assemblages of the Middle Tsagayan��Upper Tsagayan subformations��Furao and Wuyun formations from Zeya-Bureya Basin of Amur ( Heilongjiang) River region with assemblages obtained from the marine deposits of Northeast Russia��Sakhalin��Kuril��and Hokkaido Islands��dated by ammonites��foraminifers and other invertebrates�� Based on detail correlation��the geological age of the terrestrial beds was defined�� The guide fossils are recognized Marsypiletes cretacea��Tricolpites variexinus�� Aquilapollenites conatus��A�� stelkii��A�� rombicus��Integricorpus bellum��Pseudointegricorpus clarireticulatus�� Triprojectus amoenus��Orbiculapollis lucidus��Wodehouseia aspera��Quercoidites minor��which had last occurrence in the late Maastrichtian�� The Danian palynofloras usually are dominated by Triatriopollenites plicoides and T�� confusus�� The species Anacolosidites subtrudens��Aquilapollenites proceros��A�� spinulosus have last occurrence in the Danian�� The K-T ( K-Pg) boundary in the terrestrial deposits is defined in the base of the Upper Tsagayan Subformation and the base of the lower part of the Wuyun Formation�� The latter is represented by aleuropelite to fine-grained sandstones�� The change of taxonomical composition of palynospectra in similar environments could be determined by real change of flora at the Mesozoic and Cenozoic boundary��but not by changes of lithological facies or depositional environment��generally��

Keywords�� palynoflore   Cretaceous   Paleogene   boundary   Zeya-Bureya Basin  
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