breadth
发表于 2025-3-30 11:00:44
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hallow
发表于 2025-3-30 15:22:29
J. Ängeby,A. Johnsson,M. Richter,R. Bi the ammonoid shell, shows the distribution and relationships of these layers, and depicts their ultrastructure whenever possible. The major limitation in micro-and ultrastructural studies of ammonoids is diagenetic alteration, therefore the best studied ammonoids are those from the Jurassic and Cre
adroit
发表于 2025-3-30 19:24:51
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借喻
发表于 2025-3-30 21:42:53
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我不怕牺牲
发表于 2025-3-31 03:48:07
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FEAS
发表于 2025-3-31 07:39:21
Matthias Abel,Torsten Palenschat,Peter Wahl,Galin Nakov,Michael Benz,Börge Nielsen,Markus Müller associated with sudden biogeographic changes often closely related to major climatic and oceanographic changes. Previous biogeographic studies of Triassic ammonoids have rarely focused on a specific time-interval and were rarely based on quantitative methods. Thus, we will first review biogeographi
Visual-Acuity
发表于 2025-3-31 11:10:49
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填料
发表于 2025-3-31 14:58:10
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Ebct207
发表于 2025-3-31 20:25:29
Dieter van der Put,Peter Heuser,Ferenc Aubeck,Bernd Lindemann,Martin Müther,Markus Schönen,Markus Ehspecies. Concepts of Cretaceous ammonite biostratigraphy are briefly discussed and characteristic examples of the types of zones and ammonite events are given. Furthermore, accomplishments and limits of ammonite biostratigraphy are presented, including aspects of evolution, preservational modes and