Results 61 to 70 of about 4,277 (208)
Carnets de Géologie, 2008 Recent biostratigraphic research in the marly limestones of the Cassis-La Bédoule area (SE France) provided a rich macrofauna of Douvilleiceratidae Parona & Bonarelli, 1897. From the uppermost Barremian (Pseudocrioceras waagenoides Subzone) to the middle
Tronchetti Guy +4 more
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Geologica Carpathica, 2017 Euthymi, Crassicostatum and Callisto ammonite subzones, correlable with Paramimounum, Picteti, and Alpillensis subzones and probably with the Late Berriasian Otopeta Subzone of the Boissieri Standard Zone have been recognized in calcareous clays of the ...
Arkadiev Vladimir V. +6 more
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Evolution in Upper Jurassic Ammonites [PDF]
Evolution, 1959 Evolution in ammonites has been known for nearly a century. It was mainly under the influence of Charles Darwin (1859) that paleontologists began to look for successions of similar species and to connect these species into lineages. These early studies of evolution in ammonites are due to, e.g., Waagen (1869), Neumayr (1873) and Gemmellaro (1872-82 ...
openaire +2 more sources
Examples of reelaborated ammonites [PDF]
, 2011 Identify reelaborated fossils requires knowing the meaning of the term taphonomic reelaboration and the diagnostic criteria that can be used to test such preservation state. In the present work: 1) we make explicit the meaning of the taphonomic terms: accumulation, remotion or reworking, resedimentation and reelaboration, understood as diverse ...
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A new index for quantifying the ornamentational complexity of animals with shells. [PDF]
Ecol Evol, 2022 Miao L +4 more
europepmc +1 more source
HETTANGIAN AMMONITES AND RADIOLARIANS IN THE MT. CAMICIA (GRAN SASSO, CENTRAL APENNINES)
Rivista Italiana di Paleontologia e Stratigrafia, 2004 The Vallone di Vradda stratigraphic section is situated in the eastern part of the Gran Sasso range and shows the transition from Late Triassic euxinic facies to Early Liassic open pelagic facies.
ANGELA BERTINELLI +3 more
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The physical basis of mollusk shell chiral coiling. [PDF]
Proc Natl Acad Sci U S A, 2021 Chirat R, Goriely A, Moulton DE.
europepmc +1 more source
Carnets de Géologie, 2008 Since the end of the 19th century the interval comprising the uppermost Upper Albian, the Cenomamian, the Turonian and the basal Coniacian has been subdivided, first into ammonite zones, then, beginning in the middle of the 20th century, into zones of ...
Amédro Francis, Robaszynski Francis
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