RUI: Collaborative Research: Correlation and Significance ofSuper Bounding Surfaces in Eolian Sandstones: Jurassic Page Sandstone, Colorado Plateau

RUI：合作研究：风成砂岩中超边界表面的相关性和意义：科罗拉多高原侏罗纪佩吉砂岩

• 批准号: 8720260
• 负责人: Ronald Blakey
• 金额: $ 4.5万
• 依托单位: Northern Arizona University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720260&HistoricalAwards=false
• 关键词: RUI; Collaborative; Research; Correlation; Significance

Studies of eolian deposits have been severely handicapped by the lack of tools for internal correlation. However, recent recognition of unconformities within eolian units (termed super bounding surfaces) allows local and regional correlation, and the recognition of distinct genetic sequences composing eolian units. These unconformities represent hiatuses in sand-sea development and result from climatic, tectonic, and eustatic events. It is proposed to apply this new concept to a study of the Jurassic Page Sandstone on the Colorado Plateau. This unit affords excellent, almost continuously exposed outcrops across the entire breadth of the original Page sand sea into the laterally adjacent Carmel marine formation. Work thus far has recognized several super surfaces in the Page Sandstone. The genetic sequences that compose the Page Sandstone are distinct. The proposed work consists of (1) identifying super surfaces within the Page, (2) carefully correlating these through a series of closely spaced stratigraphic sections into the Carmel Formation, (3) describing and interpreting genetic sequences bounded by the surfaces, and (4) addressing the causes of the super-surface development and pulses of sandsea formation. The significance of this work is that is is a pioneer study developing the tools of super bounding surfaces for understanding laterally extensive, thick eolian sequences. It is believed that these unconformable surfaces can be of tremendous value in understanding the genetic history of eolian units, and potentially of utility in correlation of eolian units.

由于缺乏内部关联工具，风成矿床的研究受到严重阻碍。 然而，最近对风成单位内不整合面（称为超边界表面）的认识允许局部和区域相关性，以及构成风成单位的不同遗传序列的识别。 这些不整合面代表了沙海发育的中断，是由气候、构造和海平面上升事件造成的。 建议将这一新概念应用于科罗拉多高原侏罗纪佩吉砂岩的研究。 该装置提供了极好的、几乎连续暴露的露头，横跨原始佩奇沙海的整个宽度，进入横向相邻的卡梅尔海洋地层。 迄今为止的工作已经在佩吉砂岩中发现了几个超级表面。 构成佩吉砂岩的基因序列是独特的。 拟议的工作包括 (1) 识别页面内的超级表面，(2) 通过一系列紧密间隔的地层剖面将这些仔细关联到卡梅尔地层，(3) 描述和解释受表面限制的基因序列，以及 (4 ）解决超表面发育的原因和沙海形成的脉冲。 这项工作的意义在于，这是一项开创性的研究，开发了超边界表面工具，用于理解横向广泛、厚的风成序列。 据信，这些不整合表面对于理解风成单位的遗传历史具有巨大的价值，并且在风成单位的相关性方面具有潜在的实用性。