Zobrazeno 1 - 10
of 66
pro vyhledávání: '"D. Jeffrey Over"'
Autor:
James W. Hagadorn, Bonita L. Lahey, Linda K. Soar, Mark W. Longman, D. Jeffrey Over, Ryan D. Mills
Publikováno v:
Rocky Mountain Geology. 57:23-33
Paired chemostratigraphic and biostratigraphic data suggest that the Devonian–Carboniferous boundary and the Hangenberg extinction event are recorded in the Coffee Pot Member of the Dyer Formation of the White River uplift region of northwestern Co
Publikováno v:
Palaeoworld. 30:677-688
The Hongguleleng Formation, the highest and most important Devonian marine carbonate horizon in western Junggar, contains an endemic shallow-water Icriodus–Polygnathus conodont fauna with rare palmatolepids and other genera. The conodont faunas fro
Publikováno v:
GSA Bulletin. 134:1931-1948
The numerous biotic, climatic, and tectonic events of the Devonian cannot be correlated and investigated without a well-calibrated time scale. Here, we updated the calibration of the Devonian time scale using a Bayesian age-depth model that incorpora
Publikováno v:
Rocky Mountain Geology. 56:51-67
Conodont assemblages from shallow platform carbonate strata of the Dyer Formation in northwestern Colorado indicate that the unit spans the Devonian–Carboniferous transition, and include four new taxa, described herein. The underlying Parting Forma
Autor:
Cameron Boyes, Liyan Xing, Wang Zheng, Jieying Wang, D. Jeffrey Over, Brian Kendall, Stephen J. Romaniello, Alexandra Kunert, Yvonne Bennett, Jian Liu
Publikováno v:
Geochimica et Cosmochimica Acta. 287:141-164
Coupled Mo-U isotope data from the Upper Devonian Kettle Point Formation (Ontario, Canada) provide a cautionary tale regarding interpretation of global ocean redox conditions using data from euxinic black shales. In the Gore of Chatham core, the Kett
Autor:
Geoffrey J. Gilleaudeau, Yi Song, Thomas J. Algeo, Ariel D. Anbar, D. Jeffrey Over, Timothy W. Lyons, Shucheng Xie
Publikováno v:
GSA Bulletin. 133:409-424
Late Devonian marine systems were characterized by major environmental perturbations and associated biotic community changes linked to climate change and widespread oceanic anoxia. Here, we provide high-resolution lipid biomarker chemostratigraphic r
Publikováno v:
GSA bulletin, 2020, Vol.130(9-10), pp.2043-2054 [Peer Reviewed Journal]
The Devonian Period experienced significant fluctuations of atmospheric oxygen (O2) levels (∼25–13%), for which the extent and timing are debated. Also characteristic of the Devonian Period, at the Frasnian–Famennian (F–F) boundary, is one of
Autor:
Zeyang Liu, Philippe Claeys, Yue Gao, David Selby, Lawrence Percival, Delphine Vandeputte, D. Jeffrey Over
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology, 2021, Vol.576, pp.110502 [Peer Reviewed Journal]
Vrije Universiteit Brussel
Vrije Universiteit Brussel
The Frasnian–Famennian biotic crisis (~372 Ma) was one of the “big five” mass extinction events in the Phanerozoic. This event was associated with dramatic climatic and oceanographic perturbations, including oceanic anoxia, global cooling, sea-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60d952060285d89b88ae667b1bb60010
https://biblio.vub.ac.be/vubir/upper-devonian-mercury-record-from-north-america-and-its-implications-for-the-frasnianfamennian-mass-extinction(b134c5a1-9b73-4fc0-b98c-025244c03c5a).html
https://biblio.vub.ac.be/vubir/upper-devonian-mercury-record-from-north-america-and-its-implications-for-the-frasnianfamennian-mass-extinction(b134c5a1-9b73-4fc0-b98c-025244c03c5a).html
Publikováno v:
Global and Planetary Change. 216:103904
Autor:
Josephine Chiarello, Jin-Si R. Over, Yi Song, Emily Hauf, Jenelle Wallace, Thomas J. Algeo, Geoffrey J. Gilleaudeau, D. Jeffrey Over
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 524:137-149
Recognition of stratigraphic hiatuses in fine-grained siliciclastic sedimentary rocks can be challenging but is feasible using high-resolution biostratigraphic and chemostratigraphic data within a regional correlation framework. In this case study of