Regional Geological Survey of Hanggai, Xianxia and Chuancun, Zhejiang Province in China
1:50,000 Geological Maps
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Beschreibung
This Open Access book introduces readers to the regional geology of Hanggai, Xianxia and Chuancun, the area between China's northern Zhejiang Province and southern Anhui Province and explores the strata, magmatic rocks and tectonic structures in 1:50,000 scale geological maps. Based on studies of multiple stratigraphic divisions, the standard stratigraphic section of the upper Ordovician Hirnantian in the lower Yangtze region is established, revealing for the first time numerous “Burgess Shale-type” sponge fossils in Hirnantian strata and identifying 10 grapholite fossil belts and various fossil categories, including chitin, trilobites, gastropods, brachiopods, and cephalopods. Moreover, the book identifies for the first time Late Ordovician volcanic events in northern Zhejiang province.
The work represents a major contribution to research on Paleozoic strata in the Lower Yangtze region, and sheds new light on understanding the Hirnantian glacial event and biological extinction event in South China by providing a high-precision time scale. In addition, the book opens an important avenue for future research on sponge evolution after the Cambrian life explosion. As such, it offers a unique and valuable asset for researchers and graduate students alike.
This Open Access book introduces readers to the regional geology of Hanggai, Xianxia and Chuancun, the area between China's northern Zhejiang Province and southern Anhui Province and explores the strata, magmatic rocks and tectonic structures in 1:50,000 scale geological maps. Based on studies of multiple stratigraphic divisions, the standard stratigraphic section of the upper Ordovician Hirnantian in the lower Yangtze region is established, revealing for the first time numerous “Burgess Shale-type” sponge fossils in Hirnantian strata and identifying 10 grapholite fossil belts and various fossil categories, including chitin, trilobites, gastropods, brachiopods, and cephalopods. Moreover, the book identifies for the first time Late Ordovician volcanic events in northern Zhejiang province.
The work represents a major contribution to research on Paleozoic strata in the Lower Yangtze region, and sheds new light on understanding the Hirnantian glacial event and biological extinction event in South China by providing a high-precision time scale. In addition, the book opens an important avenue for future research on sponge evolution after the Cambrian life explosion. As such, it offers a unique and valuable asset for researchers and graduate students alike.
Includes beautiful images of the grapholite fossils, especially sponge fossils in the upper Ordovician Hirnantian, the first of their kind to be discovered Shares valuable insights into the unique paleogeographical environment of the survey area in the late Ordovician period, which are of great significance in paleoecology, biogeography, and evolutionary paleontology Explains Late Mesozoic intrusions, volcanic eruptions and magma evolution in northern Zhejiang province
Autor*in
Jianfang Zhang
Themen in »Regional Geological Survey of Hanggai, Xianxia and Chuancun, Zhejiang Province in China«
1:50,000 Regional Geological Survey Standard section of Hirnantian Lower yangtze region Grapholite fossil belts Anji sponge fauna Late Ordovician volcanic events Mesozoic composite plutons open acess Tianmushan volcano-tectonic depression