Mid–Late Ordovician tetradiid–calcimicrobial–cement reef: A new, peculiar reef-building consortium recording global cooling
Sign Up to like & getrecommendations! Published in 2021 at "Global and Planetary Change"
DOI: 10.1016/j.gloplacha.2021.103462
Abstract: Abstract Skeletal–microbial–cement reefs are a triple hybrid carbonate that mainly formed during the Pennsylvanian to Mid-Triassic, when a marked increase in microbial carbonate formation coincided with extensive precipitation of crystalline crusts on the seafloor. We… read more here.
Keywords: reef building; late ordovician; mid; cement reef ... See more keywords
Euxinia caused the Late Ordovician extinction: Evidence from pyrite morphology and pyritic sulfur isotopic composition in the Yangtze area, South China
Sign Up to like & getrecommendations! Published in 2018 at "Palaeogeography, Palaeoclimatology, Palaeoecology"
DOI: 10.1016/j.palaeo.2017.11.033
Abstract: Abstract The Late Ordovician mass extinction (LOME) was a severe biocrisis during the Phanerozoic and in this extinction, trilobites, brachiopods, mollusks, graptolites, conodonts and other types suffered severe mortality, and 85% of marine invertebrate species… read more here.
Keywords: late ordovician; pyritic sulfur; morphology pyritic; sulfur isotopic ... See more keywords
Climatic and oceanic changes during the Middle-Late Ordovician transition in the Tarim Basin, NW China and implications for the Great Ordovician Biodiversification Event
Sign Up to like & getrecommendations! Published in 2019 at "Palaeogeography, Palaeoclimatology, Palaeoecology"
DOI: 10.1016/j.palaeo.2018.10.032
Abstract: Abstract The Middle-Late Ordovician transition (Darriwilian to Sandbian Age) witnessed a major pulse of the Great Ordovician Biodiversification Event (GOBE) and distinctive oceanic geochemical fluctuations, such as coeval negative C and Sr isotope excursions. In… read more here.
Keywords: middle late; late ordovician; ordovician biodiversification; ordovician transition ... See more keywords
Edrioasteroids on corals: Taphonomic feedback and sedimentary processes control the ecology of a Late Ordovician (Katian: Cincinnatian, Richmondian) community in central Kentucky, USA
Sign Up to like & getrecommendations! Published in 2020 at "Palaeogeography, Palaeoclimatology, Palaeoecology"
DOI: 10.1016/j.palaeo.2019.109447
Abstract: Abstract Communities of organisms that encrusted hardgrounds and skeletal material developed and became widespread during the Great Ordovician Biodiversification Event, and this community structure was a well-established part of the marine ecosystem by the Late… read more here.
Keywords: late ordovician; community; ordovician katian; taphonomic feedback ... See more keywords
Spatiotemporal variations of sedimentary carbon and nitrogen isotopic compositions in the Yangtze Shelf Sea across the Ordovician-Silurian boundary
Sign Up to like & getrecommendations! Published in 2021 at "Palaeogeography, Palaeoclimatology, Palaeoecology"
DOI: 10.1016/j.palaeo.2021.110257
Abstract: Abstract The Hirnantian Glaciation resulted in a perturbation in global carbon cycling, which is recognized as a positive excursion in the δ13C values of both carbonates and organic matter. To investigate the factors controlling the… read more here.
Keywords: late ordovician; isotopic; carbon nitrogen; carbon ... See more keywords
Crouching shells, hidden sponges: Unusual Late Ordovician cavities containing sponges
Sign Up to like & getrecommendations! Published in 2017 at "Sedimentary Geology"
DOI: 10.1016/j.sedgeo.2016.11.003
Abstract: Abstract Marine cavities harbouring cryptic organisms have been ubiquitous throughout the Phanerozoic. However, our knowledge of early cryptic communities is as yet insufficient, and how metazoans began to utilize such habitats remains unknown. In this… read more here.
Keywords: sponges unusual; late ordovician; shells hidden; hidden sponges ... See more keywords
Abrupt global-ocean anoxia during the Late Ordovician–early Silurian detected using uranium isotopes of marine carbonates
Sign Up to like & getrecommendations! Published in 2018 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.1802438115
Abstract: Significance The Late Ordovician mass extinction (LOME) terminated one of the greatest biodiversity radiations in Earth history eliminating ∼85% of marine animals, and it is coincident with the first major glaciation of the Phanerozoic. To… read more here.
Keywords: ocean; late ordovician; global ocean; early silurian ... See more keywords
Late Ordovician high-Mg adakitic andesite in the western South China block: evidence of oceanic subduction
Sign Up to like & getrecommendations! Published in 2018 at "International Geology Review"
DOI: 10.1080/00206814.2017.1370617
Abstract: ABSTRACT The Early Palaeozoic was an important period in the geologic evolution of the South China block (SCB), marking the intracontinental orogen in the Wuyi-Yunkai region. One salient feature of the western SCB is the… read more here.
Keywords: late ordovician; south china; china block; oceanic subduction ... See more keywords
Shell Microstructure of Strophomenide Bilobia Cooper (Brachiopoda) from the Late Ordovician of Baltoscandia
Sign Up to like & getrecommendations! Published in 2019 at "Paleontological Journal"
DOI: 10.1134/s0031030119010052
Abstract: Abstract —The shell microstructure of two species of Bilobia, B. musca (Öpik, 1930) and B. alichovae Madison, 2017 (family Leptestiidae Öpik, 1933) from the Late Ordovician of Baltoscandia was studied. Possible primary layer, fibers, pseudopunctae,… read more here.
Keywords: ordovician baltoscandia; shell; shell microstructure; late ordovician ... See more keywords
Late Ordovician Reefs and the Biological Crisis at the Ordovician–Silurian Boundary
Sign Up to like & getrecommendations! Published in 2018 at "Stratigraphy and Geological Correlation"
DOI: 10.1134/s0869593818030085
Abstract: Reef formation in the Late Ordovician was relatively widespread in the Sandbian and Katian times. In the late Katian, it gradually reduced and ended in the Hirnantian, before the end of the Ordovician. In parallel,… read more here.
Keywords: late ordovician; biological crisis; ordovician reefs; crisis ordovician ... See more keywords
Late Ordovician Volcanism of the Northern Part of Altai–Sayan Area and Its Geodynamic Nature
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DOI: 10.1134/s1028334x19040093
Abstract: The results of geological–geochemical studies of some Late Ordovician associations in the frame of the Minusinsk Trough with available geological and U–Pb, Rb–Sr, and K–Ar age dates are presented. The Late Ordovician volcanic rocks form… read more here.
Keywords: part altai; northern part; late ordovician; altai sayan ... See more keywords