1) Mesoproterozoic Dahongyu Formation
中元古界大红峪组
1.
Sequence-Stratigraphic Divisions of the Mixed Rock System for Mesoproterozoic Dahongyu Formation at Huyu Section of Nankou Town in Beijing: Brief Intruduction on Microbial Mat Chips in Transgressive Sandstones;
南口虎峪中元古界大红峪组混积岩系的层序地层划分——海侵砂岩中的微生物席碎片简介
2) Dahongyu Formation
大红峪组
1.
Microbial sand chips in transgressive sandstones of the Precambrian: an example from the Dahongyu Formation at the Huyu Section of the Nankou Town in Beijing;
前寒武纪海侵砂岩中的微生物砂质碎片:以北京南口虎峪剖面大红峪组为例
2.
A Study of Event Message-bearing Sedimentary Rocks of the Proterozoic Dahongyu Formation from the Ming Tombs District, Beijing;
北京十三陵元古宙大红峪组含事件信息的沉积岩研究
3.
The high-K,high-Al and low-Si volcanic rocks of the Dahongyu Formation in studied area consist of tephrite,phonotephrite and phonolite.
华北克拉通中元古代大红峪组火山岩是一套高钾(K2O Na2O)、富铝、贫硅的碱玄岩-响质碱玄岩-响岩组合。
3) Mesoproterozoic Yangzhuang Formation
中元古界杨庄组
4) Mesoproterozoic
[,mesəu'prɔtərə'zəuik]
中元古界
1.
Microdigital stromatolites and their response to stromatolite decline at 1250Ma± for the Mesoproterozoic Wumishan Formation at Jixian section in Tianjin;
天津蓟县中元古界雾迷山组微指状叠层石及其对1250Ma±叠层石衰减事件的响应
2.
Sedimentation and evolution of the Mesoproterozoic Kunyang Group in the Huili Huidong region, Sichuan and its adjacent areas;
四川会理-会东及邻区中元古界昆阳群沉积特征及演化
3.
Research on the Sequence Stratigraphy and Sedimentology of the Mesoproterozoic Gaoyuzhuang Formation in the Yanshan Region;
燕山中元古界高于庄组层序地层及沉积特征研究
5) palaeo-middle Proterozoic
古-中元古界
6) Mesoproterozoic Gaoyuzhuang Formation
中元古界高于庄组
1.
Lots of unusual three-dimensional fossils of megascopic algae are fortunately found in the aphanitic micrites(similar to leiolite limestones)of a non-stromatolitic carbonate succession making up the third member of the Mesoproterozoic Gaoyuzhuang Formation at the Jixian section in North China.
天津蓟县剖面的中元古界高于庄组可以划分为4个段,其中第三段组成一个特别的非叠层石碳酸盐岩序列。
补充资料:蓟县中上元古界国家级自然保护区
蓟县中上元古界国家级自然保护区
位于天津市蓟县境内,面积900公顷,1984年经国务院批准建立,主要保护对象为中上元古界标准剖面,是我国第一个国家级地质剖面自然保护区。
中上元古界剖面展布在山峦重叠的燕山南脉,以岩层齐全、出露连续、保存完好、质地清楚、构造简单、变质极浅和古生物化石丰富闻名于世,并被确定为中国中上元古界的标准剖面。剖面地层总厚度达9197米,记载着距今18.5亿年至8亿年间的地质演化史,在岩层中,有生命早期阶段的宏观藻类植物,并在距今14 – 12亿年的岩层中,发现了世界罕见的微生物群,大大提前了此种微生物的出现年代,具有重要的科学价值。
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