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Academic & Professional Books  Earth System Sciences  Lithosphere  Geomorphology

Neue Untersuchungen an Strahlenkalken und Shatter-Cones in Sediment- und Kristallingesteinen (Ries-Impakt und Steinheim-Impakt, Deutschland) [New Investigations on Shatter-Cones in Sediment and Crystalline Rocks (Ries Impact Crater and Steinheim Impact Crater, Germany)]

By: Volker J Sach(Author), Johannes Baier(Author)
36 pages, 7 plates with 42 colour photos; 9 colour illustrations, 3 tables
Neue Untersuchungen an Strahlenkalken und Shatter-Cones in Sediment- und Kristallingesteinen (Ries-Impakt und Steinheim-Impakt, Deutschland)
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  • Neue Untersuchungen an Strahlenkalken und Shatter-Cones in Sediment- und Kristallingesteinen (Ries-Impakt und Steinheim-Impakt, Deutschland) ISBN: 9783899372298 Paperback Jan 2017 Usually dispatched within 6 days
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Neue Untersuchungen an Strahlenkalken und Shatter-Cones in Sediment- und Kristallingesteinen (Ries-Impakt und Steinheim-Impakt, Deutschland)Neue Untersuchungen an Strahlenkalken und Shatter-Cones in Sediment- und Kristallingesteinen (Ries-Impakt und Steinheim-Impakt, Deutschland)Neue Untersuchungen an Strahlenkalken und Shatter-Cones in Sediment- und Kristallingesteinen (Ries-Impakt und Steinheim-Impakt, Deutschland)Neue Untersuchungen an Strahlenkalken und Shatter-Cones in Sediment- und Kristallingesteinen (Ries-Impakt und Steinheim-Impakt, Deutschland)

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Language: German with bilingual summary in English and German

Shatter-cones represent the only reliable macroscopic evidence of impact- resp. shock metamorphosis, and are therefore used worldwide for the discovery and verification of impact craters.

The authors carried out investigations on shatter cones of the Ries impact, which were formed within Upper Jurassic limestones. These shatter cones (or "Strahlenkalke" in German) have been found at different distances from the Ries impact center. The locations of the investigated shatter cones are laying on a shatter cone-bearing ray of Upper Jurassic limestones, extending from the Ries impact crater to a distance of about 180 km south-southwest of the impact crater center.

Furthermore it can be stated that with increasing distance to the Ries impact center the percentage of stratigraphic older ejecta material (Middle Jurassic, Lower Jurassic and Upper Triassic rocks) also increase along the shatter cone-bearing ray of the Nördlinger Ries.

Summary in German:
Shatter-Cones stellen die bisher einzig sicheren makroskopischen Belege für die Wirkungen von Impakt bzw. Stoßwellenmetamorphose dar und werden deshalb weltweit zur Entdeckung und zum Nachweis von Impaktkratern herangezogen.

Im Rahmen unserer Untersuchungen haben wir Shatter-Cones untersucht, die während des Ries-Impaktes gebildet wurden und aus oberjurassischen Kalken bestehen. Diese Shatter-Cones (bzw. »Strahlenkalke«) wurden in verschiedenen Abständen zum Ries-Impakt-Zentrum gefunden. Die Fundstellen dieser Shatter-Cones liegen auf einem Shatter-Cone-führenden »Auswurfstrahl«, der sich vom Ries-Zentrum in südsüdwestlicher Richtung über eine Strecke von etwa 180 km erstreckt.

Zusätzlich kann entlang des Shatter-Cone-führenden Ries-Auswurfstrahls festgestellt werden, dass mit zunehmender Auswurfdistanz auch der Anteil an stratigraphisch älterem Ejekta-Material (mittel- und unterjurassische bis obertriassische Gesteine) zunimmt.

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By: Volker J Sach(Author), Johannes Baier(Author)
36 pages, 7 plates with 42 colour photos; 9 colour illustrations, 3 tables
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