615 resultados para Fossils


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Understanding the nature of the earliest complex fossils has presented many challenges over the past century since Billings first described Ediacaran fossils from Newfoundland in 1872. Previous studies have documented abundant Ediacaran fossils in the Bonavista Peninsula of Newfoundland. This thesis focuses on the H14 surface north of Catalina, which contains a nearly monospecific assemblage that includes hundreds of specimens of the rangeomorph, Fractofusus andersoni. Three factors need to be considered when trying to interpret these organisms. The first of these three factors is structural deformation. The area has undergone deformation during the formation of the Appalachian orogenic belt. This has distorted both fossil shape and orientation, requiring retrodeformation to restore the shapes and relationships of fossils to their original form. Two additional taphonomic factors influencing fossil visibility are: partly or completely ash covered fossils and the removal of fossil impressions from the bedding plane by modern weathering. These processes hinder acceptance of some previously published interpretations.

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Mode of access: Internet.

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At head of title: Memoirs of the Geological Survey of India.

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Bibliography: p. 96-98.

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Mode of access: Internet.

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Caption title: nos. 1-4, Atlantic journal, and firend of knowledge; a cyclopedic journal and review of universal science and knowledge: historical, natural, and medical arts and sciences. -- nos. 5-8, Atlantic journal and friend of knowledge; a quarterly journal of historical and natural sciences, useful knowledge, &c.

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The Illinois Fossils Activity Book from the Illinois Department of Natural Resources (IDNR) is designed to supplement your curriculum in a variety of ways. The information and activities contained in this publication are targeted to grades four through eight and can help you meet the following Illinois Learning Standards; 12.B.2a;12.B.2b; 12.B.3b.

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The information and activities contained in this publication are targeted to grades four through eight and can help you meet the following Illinois Learning Standards; 12.B.2a;12.B.2b; 12.B.3b.

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Mode of access: Internet.