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Dawan Formation

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Journal Article
Published: 06 March 2007
Canadian Journal of Earth Sciences (2007) 44 (1): 9–24.
...Renbin Zhan; Jisuo Jin; Pengfei Chen Abstract Systematic and statistical study of brachiopods from the Dawan Formation of the Yichang area, western Hubei Province, central China, indicates that, at generic and specific levels, the α diversity of Early to Mid Ordovician brachiopods in the study area...
FIGURES | View All (9)
Journal Article
Journal: Palynology
Published: 01 October 1998
Palynology (1998) 22 (1): 181–196.
...Marco Tongiorgi; Yin Leiming; Anna di Milia; Christiana Ribecai Abstract The lower part of the Dawan Formation (lower Arenig) from both the Huanghuachang and the Daping sections (Yangtze Platform, Hubei Province, South China) has yielded rich acritarch assemblages dominated by the "cold water taxa...
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Taxonomic composition of the brachiopod fauna from the <span class="search-highlight">Dawan</span> <span class="search-highlight">Formation</span>, Che...
Published: 06 March 2007
Fig. 3. Taxonomic composition of the brachiopod fauna from the Dawan Formation, Chenjiahe section, Yichang area.
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Common elements of the  Sinorthis typica  Community from the lower <span class="search-highlight">Dawan</span> Fo...
Published: 06 March 2007
Fig. 7. Common elements of the Sinorthis typica Community from the lower Dawan Formation of Yichang area and the Meitan Formation of the Tongzi area. (A, B) Sinorthis typica , NIGP140787 and 140788, ventral and dorsal internal moulds, Dawan Formation, Chenjiahe section, Yichang. (C)  Leptella
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Fig. 8   Type specimens of two species of  Nereidella . ( A–C )  Nereidella...
Published: 31 March 2008
Fig. 8 Type specimens of two species of Nereidella . ( A–C ) Nereidella typa Wang 1955, lower Dawan Formation, early Floian, Fenxiang, northern Yichang, western Hubei Province; (A) NIGP7423, holotype, dorsal view of conjoined shell; (B) NIGP7427, paratype, dorsal interior; (C) NIGP47079
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Stratigraphic ranges of brachiopods and their associations in the <span class="search-highlight">Dawan</span> For...
Published: 06 March 2007
Fig. 2. Stratigraphic ranges of brachiopods and their associations in the Dawan Formation, Chenjiahe section, Huanghuachang, northern Yichang, western Hubei Province. Circled numbers denote the number brachiopod genera in each graptolitic biozone. HF, Hunghuayuan Formation; KF, Kuniutan Formation.
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Photographs illustrating the lithology of each <span class="search-highlight">formation</span>: ( a ) the Lunshan...
Published: 04 February 2020
and the underlying Nantsinkuan Formation in the Gudongkou section; ( e ) the Fenhsiang Formation in the Gudongkou section; ( f ) the Hunghuayuan Formation in the Gudongkou section; ( g ) the Dawan Formation in the Gudongkou section; ( h ) the Zitai Formation in the Xianghsuidong section.
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Cluster analysis of five Early–Mid Ordovician brachiopod faunas from the  D...
Published: 06 March 2007
; Yichang: Dawan Formation, Chenjiahe section; Changning: Daguanshan Formation, Shuanghe section; Chengkou, Yingpan Formation, Houping section.
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(A) Principle component analysis and (B) cluster analysis of 21 collections...
Published: 06 March 2007
Fig. 5. (A) Principle component analysis and (B) cluster analysis of 21 collections from the Dawan Formation, Chenjiahe section, northern Yichang area. Four brachiopod dominated associations could be recognized: ( a ) the Leptella grandis Association, ( b ) the Yangtzeella poloi – Nereidella
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The tropical and temperate (but not high‐latitude) Gondwanan brachiopod  Ya...
Published: 01 January 2000
Fig. 7. The tropical and temperate (but not high‐latitude) Gondwanan brachiopod Yangzteela poloi (Martelli). ( a ) Upper Dawan Formation (Arenig), Huanghuachang, China, ventral interior, BB 68364, × 2; ( b, c ) Sobova Limestone (Arenig), Seydişehir, Turkey: ( b ) dorsal interior mould, BC50861
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Typical brachiopods of the  Leptella grandis  Association from the basal Da...
Published: 06 March 2007
Fig. 6. Typical brachiopods of the Leptella grandis Association from the basal Dawan Formation, Chenjiahe section, Yichang area, western Hubei. (A–C) Leptella grandis , NIGP140804, 140782, and 140783, ventral valve, and two dorsal internal moulds. (D)  Yangtzeella poloi , NIGP140807, dorsal
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Representative brachiopods of the  Protoskenidioides huanghuaensis  Associa...
Published: 06 March 2007
Fig. 8. Representative brachiopods of the Protoskenidioides huanghuaensis Association from the upper Dawan Formation, Chenjiahe section, Yichang. (A–C) Protoskenidioides huanghuaensis , NIGP140790, 140791, and 140792, dorsal, dorsal, and ventral internal moulds. (D)  Yangtzeella poloi
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Brachiopod species characteristic of the  Yangtzeella poloi  –  Nereidella ...
Published: 06 March 2007
Fig. 9. Brachiopod species characteristic of the Yangtzeella poloi – Nereidella typa Association in the upper Dawan Formation, Chenjiahe (F, L, M) and Zhenjin (A–E, G–K) sections, Yichang. (A–E) Martellia ichangensis , W2830, dorsal, ventral, lateral, posterior, and anterior views
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Figure  2 —Stratigraphic occurrences of rhipidognathid conodonts from Austr...
Published: 01 January 2001
Katkoyeh Formation; 14–16, upper Honghuayuan Formation and lower Dawan Formation; 17–19, lower Meitan Formation; 20, 21, Liangjiashan Formation; 22, San Juan Formation; 23, Ponon Trehue Formation; 24, Deep Kill Shale (eastern New York); 25, Factory Cove Member, Shallow Bay Formation of Cow
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Cartoon model illustrating the <span class="search-highlight">formation</span> of the <span class="search-highlight">Dawan</span> gabbros, <span class="search-highlight">Dawan</span> andesi...
Published: 17 October 2018
Figure 15. Cartoon model illustrating the formation of the Dawan gabbros, Dawan andesites, and Dabanxi gabbros (see details in the text). DHMA—Dawan high-Mg andesite.
Journal Article
Published: 04 February 2020
Journal of the Geological Society (2020) 177 (3): 537–549.
... and the underlying Nantsinkuan Formation in the Gudongkou section; ( e ) the Fenhsiang Formation in the Gudongkou section; ( f ) the Hunghuayuan Formation in the Gudongkou section; ( g ) the Dawan Formation in the Gudongkou section; ( h ) the Zitai Formation in the Xianghsuidong section. ...
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Figure 1. Paleogeographic reconstructions of distribution of limestone-marl...
Published: 01 March 2003
Limestone, Balclatchie Shales; Ponon Trehue, Edinburg, Clays Ferry, Martinsburg, Bull Fork, Drakes, Pamelia, Catoche, Table Point, Whitby, ?Ibbett Bay, Killerod, Yanwashan, Dawan Formations, and others. C: Permian—Rattendorf Group, Lower Magnesia, Khuff Formations, and others. D: Jurassic—Lias, Dogger, Malm
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Field photographs of the <span class="search-highlight">Dawan</span> mafic intrusion, rhyolite from the lower and...
Published: 17 October 2018
Figure 4. Field photographs of the Dawan mafic intrusion, rhyolite from the lower and upper Lapeiquan Formation, and the Dabanxi mafic intrusion: (A) cumulate structure of the Dawan gabbros; (B) euhedral pyroxenes in the Dawan gabbros; (C) intrusive contact between the Dawan mafic intrusion
Journal Article
Published: 19 February 2020
Canadian Journal of Earth Sciences (2020) 57 (8): 999–1009.
..., from the bottom up, include the Nanjinguan Formation, the Fenxiang Formation, and the Honghuayuan Formation, and the Middle Ordovician strata include the Dawan Formation and the Guniutan Formation. The Early–Middle Ordovician conodont species in this region show the same characteristics as conodonts...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 17 October 2018
Lithosphere (2018) 10 (6): 687–707.
...Figure 15. Cartoon model illustrating the formation of the Dawan gabbros, Dawan andesites, and Dabanxi gabbros (see details in the text). DHMA—Dawan high-Mg andesite. ...
FIGURES | View All (15)