Scholarlink

Abstract <p>The depositional environment of the Amasiri Sandstone within the Turonian Eze-Aku Group in the Lower Benue Trough, southeastern Nigeria, has remained controversial due to its lithological variability and complex facies architecture. This study combines detailed sedimentological observations derived from outcrop analysis, petrographic studies, and paleocurrent measurements to re-evaluate the depositional conditions and provenance of the Amasiri sandstone. Petrographic data indicate arkosic sandstone compositions, pointing toward potential source areas, including the Oban Massif, Calabar Flank, and the basement complexes around Ogoja. Analysis of sedimentological features and paleocurrent patterns supports a depositional scenario dominated by relatively dense gravity-driven sediment flows entering a marine or lagoonal basin. These findings suggest deposition within a hyperpycnal deltaic environment, providing a better understanding of the sedimentary processes that controlled the formation of the Amasiri Sandstone.</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

Reassessing the Depositional Environment of the Amasiri Sandstone in Akpoha within the Turonian Eze-Aku Group through Integrated Geological Analyses

  • 期刊论文

  • 发表日期：

    2025年9月14日

查看全文
  • Nelson Onyebuchi Nwobi,
  • Joshua Chuka Ubah,
  • Ifeanyi Chidozie Oli

摘要

Abstract

The depositional environment of the Amasiri Sandstone within the Turonian Eze-Aku Group in the Lower Benue Trough, southeastern Nigeria, has remained controversial due to its lithological variability and complex facies architecture. This study combines detailed sedimentological observations derived from outcrop analysis, petrographic studies, and paleocurrent measurements to re-evaluate the depositional conditions and provenance of the Amasiri sandstone. Petrographic data indicate arkosic sandstone compositions, pointing toward potential source areas, including the Oban Massif, Calabar Flank, and the basement complexes around Ogoja. Analysis of sedimentological features and paleocurrent patterns supports a depositional scenario dominated by relatively dense gravity-driven sediment flows entering a marine or lagoonal basin. These findings suggest deposition within a hyperpycnal deltaic environment, providing a better understanding of the sedimentary processes that controlled the formation of the Amasiri Sandstone.