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The historical record in the Scaglia limestone at Gubbio: magnetic reversals and the Cretaceous-Tertiary mass extinction |
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| Authors: | WALTER ALVAREZ |
| Institution: | Department of Earth and Planetary Science, University of California, Berkeley, CA 94720-4767, USA (E-mail: ) |
| Abstract: | |
| Keywords: | Age calibration Apennines Cretaceous–Tertiary impact geomagnetic reversals Gubbio Italy mass extinction micropalaeontology palaeomagnetism pelagic limestone solution cleavage stratigraphy |