Download Ancient Sedimentary Environments and the Habitats of Living by Professor Jean-Claude Gall (auth.) PDF

By Professor Jean-Claude Gall (auth.)

ISBN-10: 3642689094

ISBN-13: 9783642689093

ISBN-10: 3642689116

ISBN-13: 9783642689116

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Extra info for Ancient Sedimentary Environments and the Habitats of Living Organisms: Introduction to Palaeoecology

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The organisms maintain contact with the surface of the sediment by means of siphons (bivalves) or by the action of a retractile pedicle (lingulids). Arthropods (crustacea, some trilobites) protrude their anterior appendages from the burrow, while sea urchins circulate the water by the movement of their tube feet. b) V-burrows connect to the surface by two openings (Fig. 37). In such dwelling, water circulation can be maintained by contractions of the animal's body (annelids) or by the movement of appendages (arthropods).

V. Behaviour Ethology, the study of the behaviour and habits of fossil organisms, often lends itself to highly imaginative reconstructions, above all where a group is now extinct. Within the last twenty years, research on the mechanical significance of morphological peculiarities and the construction of artificial models has enabled us to understand the modes of life of fossil species much more clearly. This is the case with the feeding habits of the Tertiary large cats whose canine teeth developed into sabres (Fig.

During geological time, whole groups have existed under these conditions: radiolaria, brachiopods, scaphopods, coelenterates (corals), bryozoans, hemichordates, etc. Some stenohaline forms are only known as fossils, including the archaeocythids, trilobites, tentaculitids, graptolites, etc. The highest faunal diversities occur in marine waters of stable salinity. 2. Brackish Water Organisms Euryhaline organisms are able to colonise environments whose salinity is markedly lower than that of seawater.

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Ancient Sedimentary Environments and the Habitats of Living Organisms: Introduction to Palaeoecology by Professor Jean-Claude Gall (auth.)

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