Incluye bibliografía e índice: páginas 301-349

1. Introduction: Impact cratering as a geological process.. 2. Distal ejecta and tektites.. 3. Important distal ejecta layers and their source craters.. 4. The umbria-marche sequence.. 5. Impact stratigraphy in the U-M sequence.. 6. Documentation and laboratory techniques.. Bibliography

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The book provides a general introduction to impact stratigraphy, with emphasis on the recognition of distal impact ejecta in the field, by focusing on the impactoclastic layers of the Umbria-Marche sequence in Central Italy, with an almost perfect stratigraphic record over the last 200 million years. A general introduction to impact cratering and a discussion of distal ejecta and impact layers around the world is followed by a detailed description of the record of the impact of extraterrestrial bodies in sediments of the Umbria-Marche Apennines. The volume is of interest to a diverse audience in the geological and planetary sciences, ranging from (upper) undergraduate to research level. The bookcan also be used by students and researches as a field guide to some of the most important Italian impact layers. Inglés

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