Ammonites
- ISBN13:9781588340474
- 出版社:Smithsonian Inst Pr
- 作者:Neale Monks; Philip Palmer
- 裝訂/頁數:平裝/159頁
- 規格:23.5cm*15.2cm*1.3cm (高/寬/厚)
- 出版日:2002/05/01
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The authors describe the evolution of ammonites and their relatives and explain how they created their shells and used them as flotation devices. All the major groups of ammonites are described and illustrated (as are many minor ones), and important material is included on anatomy, feeding, reproduction, and pathology. The 300-million-year existence of ammonites ended at around the same time that dinosaurs became extinct. Fortunately, ammonites were once so abundant that their fossilized shells can be readily found, and the authors provide a helpful guide to locating and collecting these unique fossils.
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