Dinoflagellate cysts and microforaminifera of the Lower Cretaceous Yatria River section, Subarctic Ural, NW Siberia (Russia). Biostratigraphy, palaeoenvironmental and palaeogeographic discussion
作者:
NataliaK. Lebedeva,
BorisL. Nikitenko,
期刊:
Grana
(Taylor Available online 1999)
卷期:
Volume 38,
issue 2-3
页码: 134-143
ISSN:0017-3134
年代: 1999
DOI:10.1080/00173139908559222
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Rich assemblages of phytoplankton and microforaminifera (foraminifera linings) are found in the marine Lower Cretaceous section from the Yatria River (Subarctic Ural). The Lower Cretaceous (Upper Volgian to Lower Hauterivian) dinocyst and microforaminifera biostratigraphy is calibrated against the ammonite zones. The dinocyst stratigraphy differs from Arctic Canada zonation, except for the BerriasianParagonyaulacysta? borealiszone, and shows significant similarity with the zonal subdivision of Boreal regions of Europe.
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