graptolite

graptolite

1. From 2003 to 2004, we collected a large amount of Nautiloid and Graptolite fossils in upper metamorphic formations of Mayigangri area and determined the age to be middle and Late Ordovician-Silurian.

2004年我们在玛依岗日一带变质岩系上部采获大量鹦鹉螺类和笔石类化石,经研究确定时代属中、晚奥陶世-志留纪.

2. The Longmaxi formation of Lower Silurian is ten metres in thickness,containing three graptolite zones:Glyptograptus persculptus,Parakidograptus acuminatus and Orthograptus vosiculosus.

下志留统龙马溪组厚10m,含Glyptograptus persculptus,Parakidograptus acuminatus及Orthograptus vosiculosus三个笔石带.

3. The black graptolite shale facies indicate a deep-water, half enclosed and anoxic sedimentary environment.

中奥陶世黑色的笔石页岩为典型的半封闭缺氧的深水沉积环境,反映了海水逐步加深,水体也变得相对宁静。

4. These provide base for the correct measurement and valuing of graptolite reflectivity.

从而为笔石反射率的正确测定和取值奠定了基础。

5. Key words: Lower Ordovician-Middle Ordoviciam boundary, GSSP, Huanghuachang section, Yichang,Hubei, conodont, graptolite, chitinozoan

作者简介:汪啸风：1939年2月生，男，安徽安庆人，研究员，从事地层及古生物学研究。

6. Key words： graptolite fauna；

关键词 ：笔石动物群；

7. These 22 points are divided into two groups, which,represent respectiyely, two graptolite types in the early ordovician, namely, the South China type and the Central China type.

在平面图中,22个点可划分为2个点群,分别代表中国早奥陶世的两大笔石动物群,即华南型笔石动物群和华中型笔石动物群。

8. The Ordovician graptolite bearing beds have been found from the core of Tadong 2 borehole in the northeastern Tarim Basin, Xinjiang.

塔里木盆地东部塔东2井岩心中新发现了一些奥陶系笔石化石,这些笔石标本呈炭质薄膜状,保存在该井4550。

9. DISCOVERY OF MIDDLE ORDOVICIAN GRAPTOLITE BEDS IN GONGCHENG, GUANGXI

广西恭城中奥陶世笔石地层的发现

10. ORDOVICIAN GRAPTOLITE BIOSTRATIGRAPHY OF GONGCHENG, GUANGXI, CHINA

广西恭城奥陶纪含笔石地层

11. ORDOVICIAN GRAPTOLITE BEDS OF LONGYOU, CHEKIANG

浙江龙游奥陶纪笔石地层

12. Geochemical study of the Early and Middle Ordovician black graptolit bearing rock series in the southern Anhui-northern jiangxi area

皖南赣北地区早、中奥陶世含笔石黑色岩系地层地球化学的研究

13. graptolite fauna

笔石动物群

14. Graptolite biostratigraphy

笔石生物地层

15. graptolite shale

笔石页岩

16. We suggest that the strata are turbidite sequences that are deposisted on the passive continental margin.The strata containing plant, conodont and graptolite belongs to Early-Late Devonian.

该组中采获了低等蕨类植物、牙形石和笔石等化石，证实其时代属于早泥盆世-晚泥盆世。

17. DISCOVERY OF GRAPTOLITE FROM FENGSHAN FORMATION OF UPPER CAMBRIAN IN SOUTHERN LIAODONG PENINSULA AND DISCUSSION ABOUT THE TOP OF CAMBRIAN

辽东半岛南部晚寒武世凤山组笔石的发现兼论寒武系顶界

18. NEW DISCOVERY OF GRAPTOLITE FROM GUSHAN FORMATION OF THE UPPER CAMBRIAN AT LANJIA OF LIAOYANG

辽阳兰家上寒武统崮山组笔石的发现