修订的瓦纳卡地层和周围的Ouray县,科罗拉多州

L. S. Jones, C. Fenton
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引用次数: 0

摘要

明确的类型剖面和一致的命名法是成功对比地层单元和精确重建古地理的基本要求。科罗拉多高原东部中侏罗统瓦纳卡组原始类型剖面的确切位置在科罗拉多州奥雷县。描述了两个附近的参考剖面,以补充原始类型剖面中的岩性描述。这些参考剖面和原始剖面构成了Wanakah组的“主要参考剖面”。非正式名称“上页岩层”、“泥灰岩层”和“Sawpit层”被用来描述瓦纳卡的最上层。在参考部分,这些术语被正式名称“Wanakah组的弯曲树成员”所取代,以避免混淆,促进一致的使用,并促进岩石-地层对比。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Revisions to the Wanakah Formation in and around Ouray County, Colorado
A well-defined type section and consistent nomenclature are fundamental requirements for successful correlation of stratigraphic units and subsequent accurate paleogeographic reconstructions. The exact location of the original type section of the Middle Jurassic Wanakah Formation of the eastern Colorado Plateau was found in Ouray County, Colorado. Two nearby reference sections are described that supplement the lithologic descriptions in the original type section. These reference sections and the original type section constitute a “principal reference section” for the Wanakah Formation. Informal names “upper shale beds”, “marl member”, and “beds at Sawpit” have been used to describe the uppermost member of the Wanakah. These terms are replaced with the formal name, “Crooked Tree Member of the Wanakah Formation”, in the reference sections to avoid confusion, foster consistent usage, and facilitate litho-stratigraphic correlation.
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