Wyniki wyszukiwania - Biblioteka Nauki

1

Wloska restauracja w New Jersey

100%

Wojciechowska T.

Przegląd Gastronomiczny

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1997

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tom 50A

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nr 03

28

2

Short-term survival of ammonites in New Jersey after the end-Cretaceous bolide impact

84%

Landman N. H. , Garb M. P. , Rovelli R. , Ebel D. S. , Edwards L. E.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 4

EN

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.

3

Dańskie amonity - obecny stan wiedzy i perspektywy badań

71%

Machalski M. , Jagt J. W. M. , Heinberg C. , Landman N. H. , Hakansson E.

Przegląd Geologiczny

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2009

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tom Vol. 57, nr 6

486-493

EN

To date, the strongest arguments for ammonite survival into the Danian (earliest Paleogene) are based on material from the lower Danian Cerithium Limestone at Stevns Klint (Denmark), where ammonites occur above a clay layer with impact products at its base, the latter defining the Cretaceous-Paleogene (K-Pg) boundary. The best-preserved specimen is filled with Danian sediment rather than with Maastrichtian chalk, which would be expected had this been reworked material. Arguments for ammonite survival into the Danian have also been provided by specimens from the sporomorph and calcareous nannoplankton-dated lowermost Danian strata of Meerssen Member unit IVf-7, the Netherlands. Their good preservation indicates that they were not subject to any significant transport or redeposition. However, there are no unequivocal impact-related signatures in unit IVf-7, except for rare shocked quartz grains, recorded from burrows at its base. Sections in the Manasquan Basin, New Jersey, USA, provide equivocal data as far as the problem of ammonite survival into the Danian is concerned. At the top of the Tinton Formation there is a Pinna layer replete with fossils, inclusive of ammonites. Their exquisite preservation and occurrence in monospecific clusters rule out redeposition. The Pinna layer contains exclusively late Maastrichtian microfossils. However, a clear iridium anomaly has been noted at its base. Either the New Jersey ammonites survived the K-Pg event for a short time or the iridium is not in situ due to post-depositional repositioning by percolating water. Planned work is to focus on: 1) a detailed centimetre by centimetre sampling of some Cerithium Limestone basins in Denmark in search of additional ammonite material, 2) palaeontological and taphonomic analysis of ammonites and search for impact signatures in unit IVf-7 in the Netherlands, and 3) geochemical study of the iridium anomaly in New Jersey in order to determine whether its position in respect to the ammonite-bed is original or secondary.

4

New caddisflies [Insecta: Trichoptera] from Upper Cretaceous amber of New Jersey, U.S.A.

67%

Botosaneanu L. , Johnson R. O. , Dillon P. R.

Polskie Pismo Entomologiczne

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1998

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tom 67

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nr 3-4

5

Paracupes svitkoi [Coleoptera: Cupedidae], a new species from the Cretaceous of New Jersey

67%

Lubkin S. H.

Acta Zoologica Cracoviensia

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2003

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tom 46

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nr Suppl.

EN

Paracupes svitkoi is a new species based on a single specimen from the Raritan Formation of the Cretaceous of New Jersey. The fossil, a well-preserved, charcoalified head, is the first fossil member of the genus Paracupes KOLBE, 1898. It is very similar to the modern species in the genus.

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The new fossil genus of Vianaididae [Heteroptera: Tingoidea] from the Cretaceous amber of New Jersey; evolution of the family in the Late Cretaceous

67%

Golub V. B. , Popov Y. A.

Acta Zoologica Cracoviensia

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2003

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tom 46

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nr Suppl.

EN

A new genus and species Vianathauma pericarti gen. et sp. n. (Heteroptera, Vianaididae) is described from the amber of New Jersey (Upper Cretaceous, North America). It is the second known fossil monotype genus of the family alongside with two modern genera that have been described so far. Earlier presented synapomorphies for Vianaididae and Tingidae, as well as autapomorphies for Vianaididae are also specified. Taking fossil genera Vianagramma GOLUB&POPOV and Vianathauma, n. gen. as an example, authors propose two directions of morphological differentiation of Mesozoic Vianaididae. In the Cenozoic, one of these directions caused formation of specific coleopteroid myrmecophilous forms with punctate but no areolate hemelytra.