The formation encompasses two members. The first member is primarily calcareousmudstone and dolomite, indicative of a coastal environment. The second member is a thicker marine sequence of dark micriticlimestone with some dolomite. Two distinct fossil assemblages are found in the second member. The older Luoping biota preserves abundant arthropods along with fossils from other invertebrates and vertebrates, which are rare but well-preserved. The slightly younger Panxian fauna has a more diverse and common assortment of marine reptiles such as sauropterygians.[1]
Fossil content
Among others, the following fossils were reported from the formation:
^Benton, Michael J.; Zhang, Qiyue; Hu, Shixue; Chen, Zhong-Qiang; Wen, Wen; Liu, Jun; Huang, Jinyuan; Zhou, Changyong; Xie, Tao; Tong, Jinnan; Choo, Brian (2013-10-01). "Exceptional vertebrate biotas from the Triassic of China, and the expansion of marine ecosystems after the Permo-Triassic mass extinction". Earth-Science Reviews. 125: 199–243. doi:10.1016/j.earscirev.2013.05.014. ISSN 0012-8252.
January 05, 2023
guanling, formation, confused, with, guanling, biota, middle, triassic, anisian, pelsonian, regional, chronostratigraphy, geologic, formation, southwestern, china, stratigraphic, range, early, anisian, pelsonian, preꞒ, typegeological, formationunderliesyangliu. Not to be confused with Guanling biota The Guanling Formation is a Middle Triassic Anisian or Pelsonian in the regional chronostratigraphy geologic formation in southwestern China Guanling FormationStratigraphic range early mid Anisian Pelsonian 247 245 Ma PreꞒ Ꞓ O S D C P T J K Pg N TypeGeological formationUnderliesYangliujing FormationOverliesJialingjiang FormationLithologyPrimaryMudstone limestoneOtherDolomiteLocationCoordinates25 30 N 104 54 E 25 5 N 104 9 E 25 5 104 9 Coordinates 25 30 N 104 54 E 25 5 N 104 9 E 25 5 104 9Approximate paleocoordinates11 42 N 94 12 E 11 7 N 94 2 E 11 7 94 2RegionGuizhou amp Yunnan ProvincesCountry ChinaExtentYunnan Guizhou PlateauGuanling Formation China Show map of ChinaGuanling Formation Guizhou Show map of GuizhouDescription EditThe formation encompasses two members The first member is primarily calcareous mudstone and dolomite indicative of a coastal environment The second member is a thicker marine sequence of dark micritic limestone with some dolomite Two distinct fossil assemblages are found in the second member The older Luoping biota preserves abundant arthropods along with fossils from other invertebrates and vertebrates which are rare but well preserved The slightly younger Panxian fauna has a more diverse and common assortment of marine reptiles such as sauropterygians 1 Fossil content EditAmong others the following fossils were reported from the formation Atopodentatus Barracudasauroides Diandongosaurus Dianopachysaurus Honghesaurus Kyphosichthys Largocephalosaurus Luoxiongichthys Mixosaurus Qianosuchus Sanchiaosaurus Sinosaurichthys Sinosaurosphargis Wumengosaurus XinminosaurusReferences Edit Benton Michael J Zhang Qiyue Hu Shixue Chen Zhong Qiang Wen Wen Liu Jun Huang Jinyuan Zhou Changyong Xie Tao Tong Jinnan Choo Brian 2013 10 01 Exceptional vertebrate biotas from the Triassic of China and the expansion of marine ecosystems after the Permo Triassic mass extinction Earth Science Reviews 125 199 243 doi 10 1016 j earscirev 2013 05 014 ISSN 0012 8252 Retrieved from https en wikipedia org w index php title Guanling Formation amp oldid 1112065872, wikipedia, wiki, book, books, library,
