Zobrazeno 1 - 10
of 118
pro vyhledávání: '"Robert P Speijer"'
Publikováno v:
PLoS ONE, Vol 13, Iss 2, p e0193167 (2018)
The early Eocene greenhouse world was marked by multiple transient hyperthermal events. The most extreme was the Paleocene-Eocene Thermal Maximum (PETM, ~56 Ma), linked to the extinction of the globally recognised deep-sea benthic foraminiferal Velas
Externí odkaz:
https://doaj.org/article/0d07cd8de9be4e3193be2975f108233e
Publikováno v:
PLoS ONE, Vol 10, Iss 11, p e0141644 (2015)
The marine ecosystem has been severely disturbed by several transient paleoenvironmental events (0.6‰, similar in magnitude to the one previously reported from neighboring Site 1209 for benthic foraminifera. δ18O-inferred warming by 1.6 to 2.8°C
Externí odkaz:
https://doaj.org/article/7eccd6998aec44dcb1c78fc1c322f527
Publikováno v:
PLoS ONE, Vol 8, Iss 11, p e81180 (2013)
New coleoid cephalopods, assignable to the order Sepiida, are recorded from the Selandian/Thanetian boundary interval (Middle to Upper Paleocene transition, c. 59.2 Ma) along the southeastern margin (Toshka Lakes) of the Western Desert in Egypt. The
Externí odkaz:
https://doaj.org/article/f89bf7f5140547818e1f0c11484164e2
Autor:
Niels J. deWinter, Johan Vellekoop, Alexander J. Clark, Peter Stassen, Robert P. Speijer, Philippe Claeys
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 21, Iss 4, Pp n/a-n/a (2020)
Abstract Giant gastropods are among the largest mollusks in the fossil record, but their potential as paleoseasonality archives has received little attention. Here, we combine stable isotope and trace element analyses with microscopic observations an
Externí odkaz:
https://doaj.org/article/7881376126904bb2b5ea14abcf951166
Autor:
Sophie A Boerman, Gwendal Perrichon, Jian Yang, Cheng-Sen Li, Jeremy E Martin, Robert P Speijer, Thierry Smith
The earliest Crocodylia from Asia have been represented so far only by alligatoroids and planocraniids. Although definitive crocodyloids are not known until the late Eocene, it has been hypothesized that Asiatosuchus-like basal crocodyloids originate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b32b3e0ae4cb2345e2c353db702dcdb8
https://zenodo.org/record/7696034
https://zenodo.org/record/7696034
Autor:
Iris Vancoppenolle, Johan Vellekoop, Monika Doubrawa, Pim Kaskes, Matthias Sinnesael, John W.M. Jagt, Philippe Claeys, Robert P. Speijer
Publikováno v:
Netherlands Journal of Geosciences
Netherlands Journal of Geosciences, 2022, 101, pp.e12. ⟨10.1017/njg.2022.10⟩
Netherlands Journal of Geosciences, 2022, 101, pp.e12. ⟨10.1017/njg.2022.10⟩
The mid-Maastrichtian carbon isotope event (MME), dated at ∼69 Ma, reflects a perturbation of the global carbon cycle that, in part, correlates with the enigmatic global extinction of ‘true’ (i.e., non-tegulated) inoceramid bivalves. The mechan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::748bea636d8a1d62e1e27de743a913dd
https://hdl.handle.net/20.500.14017/6bcc6d10-773a-4151-a942-3e81c93e3dec
https://hdl.handle.net/20.500.14017/6bcc6d10-773a-4151-a942-3e81c93e3dec
Autor:
Johan Vellekoop, Pim Kaskes, Matthias Sinnesael, Jarno Huygh, Thomas Déhais, John W.M. Jagt, Robert P. Speijer, Philippe Claeys
Publikováno v:
Newsletters on Stratigraphy, 2022, Vol.55(4), pp.479-501 [Peer Reviewed Journal]
The youngest time interval of the Cretaceous Period is known as the Maastrichtian, in reference to the shallow-marine strata outcropping in the area surrounding the city of Maastricht, in the Netherlands-Belgium border region. While the type-Maastric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae3b395ad1f17aaf8a91ffdfac0f4e93
https://lirias.kuleuven.be/handle/20.500.12942/695970
https://lirias.kuleuven.be/handle/20.500.12942/695970
Autor:
Tali L. Babila, Donald E. Penman, Christopher D. Standish, Monika Doubrawa, Timothy J. Bralower, Marci M. Robinson, Jean M. Self-Trail, Robert P. Speijer, Peter Stassen, Gavin L. Foster, James C. Zachos
Publikováno v:
Science advances. 8(11)
The Paleocene-Eocene Thermal Maximum (PETM) is recognized by a major negative carbon isotope (δ 13 C) excursion (CIE) signifying an injection of isotopically light carbon into exogenic reservoirs, the mass, source, and tempo of which continue to be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f7299bf9c109ea857ca6f76c82ee20e
https://pubmed.ncbi.nlm.nih.gov/35294237
https://pubmed.ncbi.nlm.nih.gov/35294237
Publikováno v:
Journal of the Geological Society. 179
The early Eocene climate is characterized by gradual warming towards the Early Eocene Climatic Optimum (EECO). Environmental changes related to this global long-term warming trend are recorded in Ypresian marine sediments in Belgium. The test geochem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c09f7fb24a97ecd23c0c52b7465fc6bb
https://doi.org/10.1144/jgs2021-102
https://doi.org/10.1144/jgs2021-102
It’s nearly forty years ago that ‘A Geologic Time Scale 1982’ appeared (Harland et al. 1982); it was succeeded by major updates in 1989 (Harland et al. 1990), 2004 and 2012 (Gradstein et al. 2004, 2012 – known as GTS2004 and GTS2012, respecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b0d814d49aa6188fcdd228acae5a2771
https://doi.org/10.5194/egusphere-egu21-13175
https://doi.org/10.5194/egusphere-egu21-13175