2,253 research outputs found
Alien Registration- Macleod, Kenneth G. (Portland, Cumberland County)
No full texthttps://digitalmaine.com/alien_docs/22224/thumbnail.jp
(Appendix 2) Neodymium isotope ratios of fish teeth from ODP Leg 207 sites
No full textSediment depth is given in mcd. Furthe Nd-isotope ratios see MacLeod et al. (2008) datasets doi:10.1594/PANGAEA.722613
Interview with Jaroslav Pelikan, theologian
No full textJaroslav Pelikan was professor of religious studies at Yale University at the time of this interview. Author of From Luther to Kierkegaard, Obedient Rebels, The Christian Intellectual and Sprit Versus Structure, Pelikan discusses the problem of Christianity as a viable institution in twentieth-century American society. Interviewed by Kenneth G. Hagen, Ted Guzie, S.J., and Meredith Watts.GrayscaleSoun
Late Cretaceous benthic foraminiferal counts at Shatsky Rise
No full textThis dataset contains benthic foraminiferal population counts for ODP Leg 198, Sites 1209 and 1210 at Shatsky Rise (NW Pacific Ocean) from the late Campanian to early Danian. Other biogenic information includes inoceramid prism counts and ostracod counts. A minimum of 300 benthic specimens on the greater than 125 µm size fraction, along with other biogenics in the sample, were picked for a given split of the sample. The purpose of this dataset is so the assemblage record can be compared to stable carbon and oxygen isotopes as well as neodymium isotopes from the region to assess the relationship between changes in water mass properties and benthic foraminifera. This is done by using an R-package where Q-mode cluster analysis is applied to the percent abundance of benthic species that looks at the relationship of species among the samples
(Table 1) Strontium isotopic ratios in selected microfossils from ODP Hole 119-738C
No full text87Sr/86Sr corrected for 86Sr/88Sr mass discrimination = 0.1194 and normalized to NBS-987 SrCO3 = 0.710242
(Table T2) Stable carbon and oxygen isotopes of DSDP Leg 30, Leg 33, ODP Leg 130 and Leg 192 sites, Ontong Java Plateau
No full textStable isotopic analyses of bulk carbonates recovered from Ontong Java Plateau during Ocean Drilling Program (ODP) Leg 192 (Holes 1183A and 1186A) show an ~0.5 per mil increase in d18O values from the upper Campanian/lower Maastrichtian to the upper Maastrichtian. This shift is consistent with widespread evidence for cooling at this time. Similar shifts were found at other localities on Ontong Java Plateau (Deep Sea Drilling Project [DSDP] Sites 288 and 289 and ODP Site 807) and at DSDP Site 317 on Manihiki Plateau. These data extend evidence for Maastrichtian cooling into the southwestern tropical and subtropical Pacific. The record of apparent cooling survives despite a significant diagenetic overprint at all sites. Comparing average Maastrichtian d18O values among sites suggests that diagenesis caused d18O to first be shifted toward higher values and then back toward lower values as burial depth increased. Carbon isotopes at the six sites show no apparent primary shifts, but at four sites, the Cretaceous/Tertiary boundary interval coincides with a negative excursion attributed to alteration of sediments near the boundary
Planktonic foraminiferal endemism at southern high latitudes following the terminal Cretaceous extinction
No full textAustral planktonic foraminiferal assemblages from immediately above the Cretaceous/Paleogene (K/Pg) boundary at Ocean Drilling Program Hole 690C (Maud Rise, Weddell Sea) and International Ocean Drilling Program Hole U1514C (southeast Indian Ocean) show a much different record of post-extinction recovery than anywhere outside the circum-Antarctic region. Species of Woodringina and Parvularugoglobigerina, genera with well-documented evolutionary successions within the early Danian P0 and Pα biozones at tropical/subtropical and mid-latitude localities, are absent from southern high latitude sequences. This study proposes new criteria for biostratigraphic correlation of the lowermost Danian Antarctic Paleocene AP0 and AP1 Zones using stratophenetic observations from Scanning Electron Microscope images of lower Danian planktonic foraminifera at deep-sea sites in the southern South Atlantic and southern Indian Ocean. The small but distinctive species Turborotalita nikolasi (Koutsoukos) is a highly reliable index species for the lowermost Danian as it consistently occurs immediately above the K/Pg boundary at multiple southern high latitude sites, which is consistent with its distribution at middle and low latitudes. Also useful for cross-latitude correlation is Parasubbotina neanika n. sp., which first appears within the lowermost Danian worldwide. The geographic distribution of the New Zealand species Antarcticella pauciloculata (Jenkins) and Zeauvigerina waiparaensis (Jenkins), as well as Eoglobigerina maudrisensis n. sp. from just above the K/Pg in the southern South Atlantic and southern Indian Ocean, helps define the extent of the Austral Biogeographic Province and provides evidence for marine communication via marine seaways across Antarctica. While An. pauciloculata was previously considered a benthic species, new stable isotope evidence demonstrates that it lived a planktonic mode of life. It is possible this species evolved from a benthic ancestor and that the benthic to planktonic transition occurred through an intermediate tychopelagic lifestyle at a time when calcareous plankton were less abundant as a result of the terminal Cretaceous mass extinction
Organic geochemical investigation of terrestrial Cretaceous-Tertiary boundary successions from Brownie Butte, Montana, and the Raton Basin, New Mexico
No full textAbout the book: This volume contains the proceedings of the fourth of an informal series of meetings on mass extinctions, global catastrophes, and the geological and biological consequences of large-scale impact events. Previous meetings were held in 1981 and 1988 at Snowbird, Utah, and in 1994 Houston, Texas. The present meeting, held in 2000 in Vienna, Austria, concentrated on if (and how) short-term, high-energy events influence the biological evolution on Earth. Recently, a lot of attention has been focused on the Permian-Triassic extinction, at which about 80% of all species became extinct. The cause for this global catastrophe is currently unknown. Other short-term events (e.g., late Devonian, Triassic-Jurassic, late Eocene) in the stratigraphic record of Earth are now receiving unprecedented attention. The more than 50 papers in the volume discuss the character and causes of mass extinctions and catastrophic events in the history of our planet
Sulfur isotopic compositions across terrestrial Cretaceous-Tertiary boundary successions
No full textAbout the book: This volume contains the proceedings of the fourth of an informal series of meetings on mass extinctions, global catastrophes, and the geological and biological consequences of large-scale impact events. Previous meetings were held in 1981 and 1988 at Snowbird, Utah, and in 1994 Houston, Texas. The present meeting, held in 2000 in Vienna, Austria, concentrated on if (and how) short-term, high-energy events influence the biological evolution on Earth. Recently, a lot of attention has been focused on the Permian-Triassic extinction, at which about 80% of all species became extinct. The cause for this global catastrophe is currently unknown. Other short-term events (e.g., late Devonian, Triassic-Jurassic, late Eocene) in the stratigraphic record of Earth are now receiving unprecedented attention. The more than 50 papers in the volume discuss the character and causes of mass extinctions and catastrophic events in the history of our planet
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