منابع مشابه
Georges Cuvier, fossil bones, and geological catastrophes
(and, as significantly, so far ignored by historians). Historians of science and medicine who are not interested in the minutiae of the chemistry of life will, nevertheless, find the volume an extremely useful reference source. There are helpful names and subject indices and a generous 184 pages of bibliography. Such readers will particularly enjoy the three introductory chapters, partly drawn ...
متن کاملThe non-uniformity of fossil preservation.
The fossil record provides the primary source of data for calibrating the origin of clades. Although minimum ages of clades are given by the oldest preserved fossil, these underestimate the true age, which must be bracketed by probabilistic methods based on multiple fossil occurrences. Although most of these methods assume uniform preservation rates, this assumption is unsupported over geologic...
متن کاملExceptional fossil preservation during CO2 greenhouse crises?
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: a b s t r a c t a r t i c l e i n f o Exceptional fossil preservation may require not only exceptional places, but exception...
متن کاملMolecular preservation of the pigment melanin in fossil melanosomes.
Fossil feathers, hairs and eyes are regularly preserved as carbonized traces comprised of masses of micrometre-sized bodies that are spherical, oblate or elongate in shape. For a long time, these minute structures were regarded as the remains of biofilms of keratinophilic bacteria, but recently they have been reinterpreted as melanosomes; that is, colour-bearing organelles. Resolving this funda...
متن کاملOrganic preservation of fossil musculature with ultracellular detail.
The very labile (decay-prone), non-biomineralized, tissues of organisms are rarely fossilized. Occurrences thereof are invaluable supplements to a body fossil record dominated by biomineralized tissues, which alone are extremely unrepresentative of diversity in modern and ancient ecosystems. Fossil examples of extremely labile tissues (e.g. muscle) that exhibit a high degree of morphological fi...
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ژورنال
عنوان ژورنال: Nature
سال: 1933
ISSN: 0028-0836,1476-4687
DOI: 10.1038/131694b0