Autor: Edwards, H. L. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Scanning Probe Microscopy and Spectroscopy of High Temperature Superconductors
Autorzy:: de Lozanne, A. L.
Edwards, H. L.
Yuan, C.
Markert, J. T.
Powiązania:: https://bibliotekanauki.pl/articles/1968757.pdf
Data publikacji:: 1998-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.16.Ch
74.50.+r
07.79.Cz
07.79.Pk
74.72.Bk
74.72.Hs
Opis:: The authors review recent studies of high temperature superconductors conducted with scanning tunneling and magnetic force microscopes. Emphasis is placed on the importance of surface and probe characterization, both of which are likely to affect the detailed nature of the observations.
Źródło:: Acta Physica Polonica A; 1998, 93, 2; 333-342
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Short-term survival of ammonites in New Jersey after the end-Cretaceous bolide impact
Autorzy:: Landman, N.H.
Garb, M.P.
Rovelli, R.
Ebel, D.S.
Edwards, L.E.
Powiązania:: https://bibliotekanauki.pl/articles/22198.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:: short-term survival
ammonite
New Jersey
Cretaceous
bolide impact
Ammonoidea
biostratigraphy
extinction
Paleogene
boundary
Opis:: A section containing the Cretaceous/Paleogene (= Cretaceous/Tertiary) boundary in Monmouth County, New Jersey, preserves a record of ammonites extending from the end of the Cretaceous into possibly the beginning of the Danian. The section includes the upper part of the Tinton Formation and lower part of the Hornerstown Formation. The top of the Tinton Formation is represented by a richly fossiliferous unit (the Pinna Layer) that contains many bivalves in life position as well as ammonite jaws preserved inside body chambers. Ammonites include Pachydiscus (Neodesmoceras) mokotibensis, Sphenodiscus lobatus, Eubaculites carinatus, E. latecarinatus, Discoscaphites iris, D. sphaeroidalis, D. minardi, and D. jerseyensis. The Pinna Layer probably represents a relatively short interval of time lasting tens to hundreds of years; it is conformably overlain by the Burrowed Unit, which contains a single fragment of Discoscaphites sp. and several fragments of E. latecarinatus, as well as several isolated specimens of ammonite jaws including two of Eubaculites. Examination of the mode of preservation of the ammonites and jaws suggests that they were fossilized during deposition of the Burrowed Unit and were not reworked from older deposits. Based on the ammonites and dinoflagellates in the Pinna Layer and the Burrowed Unit, these strata traditionally would be assigned to the uppermost Maastrichtian, corresponding to calcareous nannofossil Subzone CC26b. However, a weak iridium anomaly (500–600 pg/g) is present at the base of the Pinna Layer, which presumably represents the record of the bolide impact. Correlation with the iridium layer at the Global Stratotype Section and Point at El Kef, Tunisia, would, therefore, imply that these assemblages are actually Danian, provided that the iridium anomaly is in place and the ammonites and dinoflagellates are not reworked. If the iridium anomaly is in place, or even if it has migrated downward from the top of the Pinna Layer, the ammonites would have survived the impact at this site for a brief interval of time lasting from a few days to hundreds of years.
Źródło:: Acta Palaeontologica Polonica; 2012, 57, 4
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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