Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China
Late Ordovician rocks of the Qilang and Yingan formations from the Kalpin area in the Tarim region of western Xinjiang, China (Tarim palaeoplate) contain a moderately diverse graptolite fauna. The fauna from the Qilang Formation contains Corynoides calicularis Nicholson, 1867; Dicranograptus clingan...
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crcambridgeupr:10.1017/s0022336000031498 2024-03-03T08:46:45+00:00 Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China Xu, Chen Yu-Nan, Ni Mitchell, Charles E. Xin-Dong, Qiao Shi-Gao, Zhan 2000 http://dx.doi.org/10.1017/s0022336000031498 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000031498 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Paleontology volume 74, issue 2, page 282-300 ISSN 0022-3360 1937-2337 Paleontology journal-article 2000 crcambridgeupr https://doi.org/10.1017/s0022336000031498 2024-02-08T08:45:04Z Late Ordovician rocks of the Qilang and Yingan formations from the Kalpin area in the Tarim region of western Xinjiang, China (Tarim palaeoplate) contain a moderately diverse graptolite fauna. The fauna from the Qilang Formation contains Corynoides calicularis Nicholson, 1867; Dicranograptus clingani resicis Williams and Bruton, 1983; Lasiograptus costatus Lapworth, 1873; Pseudoclimacograptus scharenbergi (Lapworth, 1876); and Glossograptus sp. among other species. This assemblage most likely corresponds to the upper Climacograptus (Climacograptus) bicornis Zone? to lower C. (Diplacanthograptus) lanceolatus Zone of Australia. The Qilang Formation also yields the new taxon, Amplexograptus maxwelli spinousus new subspecies. The overlying Yingan Formation yields a more diverse assemblage that includes Climacograptus (Diplacanthograptus) spiniferus Ruedemann, 1912; C. (D.) lanceolatus VandenBerg, 1990; Orthograptus quadrimucronatus (Hall, 1865); Amplexograptus praetypicalis Riva, 1987; Dicellograptus pumilus Lapworth, 1876; and D. morrisi Hopkinson, 1871. This assemblage most likely corresponds to the Corynoides americanus Zone through the C. (D.) spiniferus Zone of eastern Laurentia, or to the D. clingani Zone of Scotland and central Newfoundland. The presence of a C. (D.) lanceolatus and C. (D.) spiniferus succession in the Yingan Formation also suggests correlation with the Eastonian 1 and 2 of Australasia. The Yingan Formation faunas represent an offshore Pacific Province assemblage dominated by cosmopolitan epipelagic species. The fauna is most similar, both in terms of species composition and relative abundance patterns, to those of the Appalachian Basin. The Yingan faunas differ from the latter in the absence of Laurentian endemic species (except for Amplexograptus praetypicalis ), and in the common occurrence of dicellograptids. Article in Journal/Newspaper Newfoundland Cambridge University Press Pacific Nicholson ENVELOPE(78.236,78.236,-68.612,-68.612) Riva ENVELOPE(12.638,12.638,66.488,66.488) Journal of Paleontology 74 2 282 300 |
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Cambridge University Press |
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English |
topic |
Paleontology |
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Paleontology Xu, Chen Yu-Nan, Ni Mitchell, Charles E. Xin-Dong, Qiao Shi-Gao, Zhan Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China |
topic_facet |
Paleontology |
description |
Late Ordovician rocks of the Qilang and Yingan formations from the Kalpin area in the Tarim region of western Xinjiang, China (Tarim palaeoplate) contain a moderately diverse graptolite fauna. The fauna from the Qilang Formation contains Corynoides calicularis Nicholson, 1867; Dicranograptus clingani resicis Williams and Bruton, 1983; Lasiograptus costatus Lapworth, 1873; Pseudoclimacograptus scharenbergi (Lapworth, 1876); and Glossograptus sp. among other species. This assemblage most likely corresponds to the upper Climacograptus (Climacograptus) bicornis Zone? to lower C. (Diplacanthograptus) lanceolatus Zone of Australia. The Qilang Formation also yields the new taxon, Amplexograptus maxwelli spinousus new subspecies. The overlying Yingan Formation yields a more diverse assemblage that includes Climacograptus (Diplacanthograptus) spiniferus Ruedemann, 1912; C. (D.) lanceolatus VandenBerg, 1990; Orthograptus quadrimucronatus (Hall, 1865); Amplexograptus praetypicalis Riva, 1987; Dicellograptus pumilus Lapworth, 1876; and D. morrisi Hopkinson, 1871. This assemblage most likely corresponds to the Corynoides americanus Zone through the C. (D.) spiniferus Zone of eastern Laurentia, or to the D. clingani Zone of Scotland and central Newfoundland. The presence of a C. (D.) lanceolatus and C. (D.) spiniferus succession in the Yingan Formation also suggests correlation with the Eastonian 1 and 2 of Australasia. The Yingan Formation faunas represent an offshore Pacific Province assemblage dominated by cosmopolitan epipelagic species. The fauna is most similar, both in terms of species composition and relative abundance patterns, to those of the Appalachian Basin. The Yingan faunas differ from the latter in the absence of Laurentian endemic species (except for Amplexograptus praetypicalis ), and in the common occurrence of dicellograptids. |
format |
Article in Journal/Newspaper |
author |
Xu, Chen Yu-Nan, Ni Mitchell, Charles E. Xin-Dong, Qiao Shi-Gao, Zhan |
author_facet |
Xu, Chen Yu-Nan, Ni Mitchell, Charles E. Xin-Dong, Qiao Shi-Gao, Zhan |
author_sort |
Xu, Chen |
title |
Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China |
title_short |
Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China |
title_full |
Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China |
title_fullStr |
Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China |
title_full_unstemmed |
Graptolites from the Qilang and Yingan formations (Caradoc, Ordovician) of Kalpin, western Tarim, Xinjiang, China |
title_sort |
graptolites from the qilang and yingan formations (caradoc, ordovician) of kalpin, western tarim, xinjiang, china |
publisher |
Cambridge University Press (CUP) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1017/s0022336000031498 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000031498 |
long_lat |
ENVELOPE(78.236,78.236,-68.612,-68.612) ENVELOPE(12.638,12.638,66.488,66.488) |
geographic |
Pacific Nicholson Riva |
geographic_facet |
Pacific Nicholson Riva |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Journal of Paleontology volume 74, issue 2, page 282-300 ISSN 0022-3360 1937-2337 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0022336000031498 |
container_title |
Journal of Paleontology |
container_volume |
74 |
container_issue |
2 |
container_start_page |
282 |
op_container_end_page |
300 |
_version_ |
1792502800594239488 |