Scholarlink

Abstract <p>Nannoplankton was first discovered in the core of the Lower Berezovo Subformation from Borehole Russkaya 5_05 at a depth of 674.8 m in flaky clay-siliceous siltstones. The presence of <i>Arkhangelskiella cymbiformis</i> suggests that the age of the host beds are not older than the Late Santonian, and the age range can be defined as the Upper Santonian–Campanian–Maastrichtian. The radiolarian association is dated Campanian. The composition of foraminifers is typical of the upper part of the Lower Berezovian Regional Substage.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The First Discovery of Calcareous Nannoplankton in the Lower Berezovo Subformation (Upper Cretaceous, Coniacian–Campanian Stages) of Western Siberia

  • 期刊论文

  • 发表日期：

    2025年10月1日

查看全文
  • M. A. Ustinova,
  • V. S. Vishnevskaya,
  • V. A. Marinov,
  • A. S. Ovchinnikova,
  • E. A. Zhegallo

摘要

Abstract

Nannoplankton was first discovered in the core of the Lower Berezovo Subformation from Borehole Russkaya 5_05 at a depth of 674.8 m in flaky clay-siliceous siltstones. The presence of Arkhangelskiella cymbiformis suggests that the age of the host beds are not older than the Late Santonian, and the age range can be defined as the Upper Santonian–Campanian–Maastrichtian. The radiolarian association is dated Campanian. The composition of foraminifers is typical of the upper part of the Lower Berezovian Regional Substage.