On some new crag fossils
نویسندگان
چکیده
منابع مشابه
Fossils, molecules and embryos: new perspectives on the Cambrian explosion.
The Cambrian explosion is named for the geologically sudden appearance of numerous metazoan body plans (many of living phyla) between about 530 and 520 million years ago, only 1.7% of the duration of the fossil record of animals. Earlier indications of metazoans are found in the Neoproterozic; minute trails suggesting bilaterian activity date from about 600 million years ago. Larger and more el...
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For many years evolutionists have pointed to the alleged transition of reptiles to mammals as being the best example of the natural origin of a major taxon. At first sight such claims appear to have considerable justification, but when the fossil evidence is closely examined it can be shown that there are some grave deficiencies, and the claim is not only factually unproved but also contains a ...
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ژورنال
عنوان ژورنال: Proceedings of the Geologists' Association
سال: 1874
ISSN: 0016-7878
DOI: 10.1016/s0016-7878(74)80060-x