期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Conodont Biostratigraphy and Evolution across Permian-Triassic Boundary at Yangou Section,Leping,Jiangxi Province,South China 被引量:14
1
作者 孙冬英 童金南 +2 位作者 熊炎林 田力 殷鸿福 《Journal of Earth Science》 SCIE CAS CSCD 2012年第3期311-325,共15页
Series of large conodont samples with 20 species and 3 similar species in 3 genera were collected from the Permian-Triassic (P-T) boundary sequence in a shallow carbonate facies at Yangou (沿沟), Leping (乐平) C... Series of large conodont samples with 20 species and 3 similar species in 3 genera were collected from the Permian-Triassic (P-T) boundary sequence in a shallow carbonate facies at Yangou (沿沟), Leping (乐平) County, Jiangxi (江西) Province, South China. On the basis of the distributions of the identified species, seven conodont zones have been recognized in ascending order as follows, Neogondolella changxingensis zone, Neogondolella yini zone, Hindeodus changxingensis zone, Neogon- dolella taylorae zone, Hindeodus parvus zone, Isarcicella staeschei zone, and IsarciceUa isarcica zone. The successive occurrences of Hindeodus changxingensis, NeogondoleUa taylorae and Hindeodus parvus serve as proxies for defining the P-T biostratigraphy boundary at the base of Sub-bed 21-4 of Bed 21 in the Yangou Section. Correlations with the Meishan Section are also discussed in terms of conodont bio-stratigraphy. Three successive conodont faunal assemblages are grouped through the P-T transitional interval to examine the evolution of conodonts across the great transitional event. 展开更多
关键词 Permian-Triassic boundary conodont biostratigraphy conodont evolution Yangou South China.
原文传递
Middle Triassic(Anisian)Conodont Biostratigraphy at the Shaiwa Section,Guizhou,South China
2
作者 Binxian Qin Martyn Lee Golding +5 位作者 Haishui Jiang Yan Chen Muhui Zhang Li Kang Dacheng Wang Jinling Yuan 《Journal of Earth Science》 SCIE CAS CSCD 2021年第3期592-615,共24页
The Nanpanjiang Basin is a key area for paleontological and biostratigraphical study of the Middle Triassic.Herein we studied Middle Triassic conodonts from a well-exposed section,the Shaiwa Section,which is located a... The Nanpanjiang Basin is a key area for paleontological and biostratigraphical study of the Middle Triassic.Herein we studied Middle Triassic conodonts from a well-exposed section,the Shaiwa Section,which is located at the northwest end of the Nanpanjiang Basin.A total of six Anisian conodont zones are recognized;in ascending order,they are:the Nicoraella germanica Zone,the Nicoraella kockeli Zone,the Paragondolella bulgarica Zone,the Neogondolella constricta Zone,the Neogondolella cornuta Zone,and the Paragondolella excelsa Zone,respectively.The first occurrence of Nicoraella kockeli defines the Bithynian-Pelsonian boundary.The Pelsonian-Illyrian boundary is defined by the first occurrence of Neogondolella constricta.The Anisian-Ladinian boundary cannot be recognized at the Shaiwa Section due to the absence of conodont indicative of the Ladinian.However,the new conodont data indicate that the uppermost strata could be very close to the boundary.The abrasion of conodont surfaces provides evidence for demonstrating reworking at the Shaiwa Section,which makes some conodonts possess a longer stratigraphic range than previously recorded.The variation in relative abundance between blade-shaped conodonts and platform conodonts indicates that segminiplanate elements probably preferred deeper and oxygenated environments whereas a restricted marine environment is more suitable for segminate elements. 展开更多
关键词 conodont biostratigraphy Middle Triassic Shaiwa Section Nanpanjiang Basin
原文传递
Discussion on Induan-Olenekian Boundary in Chaohu, Anhui Province, China 被引量:7
3
作者 Zhao Laishi Tong Jinnan Zuo Jingxun Ming Houli China University of Geosciences, Wuhan 430074 《Journal of China University of Geosciences》 SCIE CSCD 2002年第2期141-150,共10页
This paper proposes a scheme for the definition of the Lower Triassic Induan Olenekian boundary (IOB) based on investigation of sections in Chaohu, Anhui Province, China as well as data accumulated from other studies... This paper proposes a scheme for the definition of the Lower Triassic Induan Olenekian boundary (IOB) based on investigation of sections in Chaohu, Anhui Province, China as well as data accumulated from other studies elsewhere. The conodont Neospathodus waageni is suggested as the index fossil of the boundary. According to the FAD of N. waageni , the IOB is at the base of bed 25 2 of the West Pingdingshan Section in Chaohu, 42.19 m above the Permian Triassic boundary, and it is slightly higher than the base of the Flemingites Euflemingites Ammonoid Zone at the section. 展开更多
关键词 Lower Triassic Induan Olenekian boundary conodont biostratigraphy CHAOHU Anhui Province.
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部