Review of Oxfordian (Upper Jurassic) sequence stratigraphy of England (Yorkshire to Dorset) and a comparison with the North Sea Basin

IF 1.3 4区地球科学 Q2 Earth and Planetary Sciences

Proceedings of the Geologists Association Pub Date : 2025-06-02 DOI:10.1016/j.pgeola.2025.101125

John K. Wright

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Abstract

A critical investigation is made of the unconformities reportedly present in Oxford Clay Formation and Corallian Group (Jurassic, Oxfordian) strata in central and southern England. A revised cross-section through strata belonging to the coeval Coralline Oolite Group and Upper Calcareous Grit and Ampthill Clay formations of the Tabular Hills, North Yorkshire is used to show the lateral extent of unconformities within these strata. There is definite correlation of only two of these unconformities present in Yorkshire with similar erosive episodes in the equivalent strata in southern England. The extent to which the sequences of strata delimited by these unconformities can be correlated with sequences defined in the North Sea Basin is discussed. The tectonic nature of the unconformities is evident, as there was not a simple drop in relative sea-level causing erosion. Erosion occurred down to deeper levels in certain areas, this being caused by differential uplift. The reasons for this phenomenon are still to be determined.

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英国（约克郡-多塞特）牛津（上侏罗统）层序地层学综述及与北海盆地的比较

本文对英国中南部牛津粘土组和Corallian群（侏罗纪、牛津系）地层中的不整合面进行了研究。对英国北约克郡Tabular Hills同时期珊瑚系鲕粒组、上钙质砂砾组和Ampthill粘土组的地层进行了修正，以显示这些地层的横向不整合程度。在约克郡，只有两个不整合面与英格兰南部等效地层中类似的侵蚀事件有明确的相关性。讨论了这些不整合面所划分的层序与北海盆地所确定的层序的对比程度。不整合的构造性质是显而易见的，因为相对海平面的简单下降并不是造成侵蚀的原因。在某些地区，侵蚀发生在更深的层次，这是由差异隆起引起的。造成这种现象的原因还有待确定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Geologists Association 地学-地质学

CiteScore

2.70

自引率

8.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The Proceedings of the Geologists'' Association is an international geoscience journal that was founded in 1859 and publishes research and review papers on all aspects of Earth Science. In particular, papers will focus on the geology of northwestern Europe and the Mediterranean, including both the onshore and offshore record. Following a long tradition, the PGA will focus on: i) a range of article types (see below) on topics of wide relevance to Earth Sciences ii) papers on aspects of Earth Science that have societal relevance including geoconservation and Earth management, iii) papers on palaeoenvironments and palaeontology of the Mesozoic and Cenozoic, iv) papers on aspects of Quaternary geology and climate change, and v) papers on the history of geology with particular reference to individuals that have shaped the subject. These topics will also steer the content of the themes of the Special Issues that are published in the PGA.